The tennis semifinals took center stage on Day 7 of the 2012 London Summer Olympics as Serena Williams overwhelmed Victoria Azarenka of Belarus in women's singles. The Wimbledon champion will play first-time Olympian Maria Sharapova, who beat her Russian teammate Maria Kirilenko, for the gold on Saturday in the tennis finals.

For the men, Switzerland's Roger Federer overcame Juan Martin del Potro of Argentina in the singles tennis semifinals, clinching at least the silver medal. He's face either Novak Djokovic of Serbia or Andy Murray of Britain in final matchup for the gold on Sunday.

U.S. beach volleyball players Jennifer Kessy and April Ross advanced to the next round after defeating Switzerland 21-15, 21-19.

In soccer, the U.S. women's team are heading to the semifinals following Friday's 2-0 defeat of New Zeland. Abby Wambach scored the first goal of the game, celebrating with a cartwheel, and Sydney Leroux, the youngest player on the team, threw in another one for good measure in the 87th minute of the matchup.

Friday's events include qualifying rounds in basketball, beach volleyball, boxing, diving, equestrian, field hockey, handball, rowing, sailing, soccer, table tennis, tennis, volleyball and water polo -- plus medal events in archery, badminton, cycling, fencing, gymnastics, judo, shooting, swimming, track and field and weightlifting.

Check out the gallery below to see some of the best photos from day seven of the 2012 Summer Olympic Games.

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  • Perfect Form

    LONDON, ENGLAND - AUGUST 03: Tania Cagnotto of Italy competes in the Women's 3m Springboard Diving Preliminary Round on Day 7 of the London 2012 Olympic Games at the Aquatics Centre on August 3, 2012 in London, England. (Photo by Clive Rose/Getty Images)

  • On The Return

    LONDON, ENGLAND - AUGUST 03: Roger Federer of Switzerland returns a shot against Juan Martin Del Potro of Argentina in the Semifinal of Men's Singles Tennis on Day 7 of the London 2012 Olympic Games at Wimbledon on August 3, 2012 in London, England. (Photo by Clive Brunskill/Getty Images)

  • Colombia Warms Up

    Colombia's Edwin Alcibiades Avila Vanegas, Arles Antonio Castro Laverde, Kevin Daniel Rios Quintana and Weimar Alfonso Roldan Ortiz warm up before their London 2012 Olympic Games men's team pursuit track cycling event at the Veldorome in the Olympic Park in East London on August 3, 2012. (Photo credit LEON NEAL/AFP/GettyImages)

  • On The Trampoline

    Denmark's Peter Jensen performs during the men's trampoline qualification at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Gregory Bull)

  • Flying Kick

    Japan's Aya Miyama kicks against Brazil during a women's soccer quarter-final match at the Millennium stadium in Cardiff, Wales, at the 2012 London Summer Olympics, Friday, Aug. 3, 2012. (AP Photo/Luca Bruno

  • Tuck And Dive

    LONDON, ENGLAND - AUGUST 03: Anna Lindberg of Sweden competes in the Women's 3m Springboard Diving Preliminary Round on Day 7 of the London 2012 Olympic Games at the Aquatics Centre on August 3, 2012 in London, England. (Photo by Clive Rose/Getty Images)

  • Served

    Russia's Maria Sharapova serves to compatriot Maria Kirilenko during their women's single tennis match semi-Final at the London 2012 Olympic Games in London on August 3, 2012. (Photo credit should read LUIS ACOSTA/AFP/GettyImages)

  • And They're Off

    Swimmers take the start of the men's 4 x 100-meter relay heats during the swimming event at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Martin Bureau, Pool)

  • Full Swing

    Slovakia's Marcel Lomnicky makes an attempt in the men's Hammer Throw qualification during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 3, 2012. (AP Photo/Matt Dunham)

  • Sweet Victory

    Malaysia's Lee Chong Wei kisses the court after defeating China's Chen Long in a men's singles badminton semifinal match at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Andres Leighton)

  • Over The Puddle

    France's Mahiedine Mekhissi-Benabbad, right, competes in a men's 3000-meter steeplechase heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 3, 2012. (AP Photo/David J. Phillip)

  • Collapsing In Excitement

    PHOTO TAKEN WITH A ROBOTIC CAMERA Zhang Nan of China falls to the court after victory in his mixed doubles final badminton match with Zhao Yunlei against compatriots Ma Jin and Xu Chen in London on August 3, 2012, for The 2012 London Olympic Games. (Photo credit should read ANTONIN THUILLIER/AFP/GettyImages)

  • Kazakhstan's Gold Celebration

    LONDON, ENGLAND - AUGUST 03: Svetlana Podobedova of Kazakhstan celebrates winning Gold during the Women's 75kg Weightlifting Final on Day 7 of the London 2012 Olympic Games at ExCeL on August 3, 2012 in London, England. (Photo by Laurence Griffiths/Getty Images)

  • Head-To-Head

    NEWCASTLE UPON TYNE, ENGLAND - AUGUST 03: Lauren Cheney of the United States battles with Ria Percival of New Zealand during the Women's Football Quarter Final match between United States and New Zealand, on Day 7 of the London 2012 Olympic Games at St James' Park on August 3, 2012 in Newcastle upon Tyne, England. (Photo by Stanley Chou/Getty Images)

  • Full Extension

    LONDON, ENGLAND - AUGUST 03: Lidia Valentin Perez of Spain competes in the Women's 75kg Weightlifting Final on Day 7 of the London 2012 Olympic Games at ExCeL on August 3, 2012 in London, England. (Photo by Laurence Griffiths/Getty Images)

  • Canada Dodges

    Custio Clayton (R) of Canada defends against Cameron Hammond (L) of Australia during their round of 16 Welterwight (69kg) match of the London 2012 Olympic Games at the ExCel Arena on August 3, 2012 in London. Clayton won on a 14-11 points decision. (Photo credit JACK GUEZ/AFP/GettyImages)

  • Twisting Through The Air

    LONDON, ENGLAND - AUGUST 03: Jocelyn Castillo Suarez of Venezuela competes in the Women's 3m Springboard Diving Preliminary Round on Day 7 of the London 2012 Olympic Games at the Aquatics Centre on August 3, 2012 in London, England. (Photo by Clive Rose/Getty Images)

  • Taking A Breath

    Japan's Satomi Suzuki swims the breaststroke leg of the women's 4 x 100-meter medley relay at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Friday, Aug. 3, 2012. (AP Photo/Matt Slocum)

  • Vying For The Ball

    Canadian centre Krista Phillips (L) vies with Brazilian centre Erika Souza during the women's preliminary round group B basketball match Brazil vs Canada of the London 2012 Olympic Games on August 3, 2012 at the basketball arena in London. (Photo credit MARK RALSTON/AFP/GettyImages)

  • Double-Teamed

    United States' Alex Morgan, center, vies for the ball with New Zealand's Abby Erceg, left, and Rebecca Smith, right, during their women's quarter-final soccer match at St James' Park in Newcastle, England, during the London 2012 Summer Olympics, Friday, Aug. 3, 2012. (AP Photo/Scott Heppell)

  • Time To Celebrate

    Latvia's Martins Plavins celebrates at the end of the men Beach Volleyball round of 16 match against Norway's Tarjei Viken Skarlund and Martin Spinnangr on the Centre Court Stadium in Horse Guards Parade on London on August 03, 2012, for the London 2012 Olympic Games. Latvia won 2-0. (Photo credit should read DANIEL GARCIA/AFP/GettyImages)

  • At The Finish

    WINDSOR, ENGLAND - AUGUST 03: Sarah Trowbridge and Margot Shumway of the United States react after competing in the Women's Double Sculls final on Day 7 of the London 2012 Olympic Games at Eton Dorney on August 3, 2012 in Windsor, England. (Photo by Ezra Shaw/Getty Images)

  • Riding At An Angle

    Great Britain's Edward Clancy, Geraint Thomas, Steven Burke and Peter Kennaugh compete during the London 2012 Olympic Games men's team pursuit track cycling event at the Veldorome in the Olympic Park in East London on August 3, 2012. (Photo credit ODD ANDERSEN/AFP/GettyImages)

  • Rejoicing On The Court

    Brazilian guard Joice Rodrigues gestures during the women's preliminary round group B basketball match Brazil vs Canada of the London 2012 Olympic Games on August 3, 2012 at the basketball arena in London. Canada won 79 to 73. (Photo credit should read MARK RALSTON/AFP/GettyImages)

  • Barely Connecting

    LONDON, ENGLAND - AUGUST 03: Juan Martin Del Potro of Argentina returns a shot to Roger Federer of Switzerland in the Semifinal of Men's Singles Tennis on Day 7 of the London 2012 Olympic Games at Wimbledon on August 3, 2012 in London, England. (Photo by Clive Brunskill/Getty Images)

  • Straight-Legged

    LONDON, ENGLAND - AUGUST 03: Minxia Wu of China competes in the Women's 3m Springboard Diving Preliminary Round on Day 7 of the London 2012 Olympic Games at the Aquatics Centre on August 3, 2012 in London, England. (Photo by Clive Rose/Getty Images)

  • Injury On The Court

    Croatia's centreback Miranda Tatari reacts after falling during the women's preliminary Group A handball match Croatia vs Montenegro for the London 2012 Olympics Games on August 3, 2012 at the Copper Box hall in London. (Photo credit JAVIER SORIANO/AFP/GettyImages)

  • We Can't All Be Winners

    Britain's Karina Bryant (blue) commisserate with Ukraine's Iryna Kindzerska (white) after their women's +78kg judo contest bronze medal match of the London 2012 Olympic Games on August 3, 2012 at the ExCel arena in London. (Photo credit MIGUEL MEDINA/AFP/GettyImages)

  • Duck And Cover

    Tuvshinbat Byamba (R) of Mongolia defends against Alexis Vastine (L) of France in their round of 16 Welterwight (69kg) match of the London 2012 Olympic Games at the ExCel Arena on August 3, 2012 in London. Vastine was vawarded a close 13-12 points decision. (Photo credit JACK GUEZ/AFP/GettyImages)

  • Look Of Determination

    LONDON, ENGLAND - AUGUST 03: Shona Thorburn #6 of Canada reacts after hitting a three point shot against Brazil during the Women's Basketball Preliminary Round match on Day 7 of the London 2012 Olympic Games at Basketball Arena on August 3, 2012 in London, England. (Photo by Christian Petersen/Getty Images)

  • Going For The Block

    Brazilian centre Clarissa Santos (R) vies with Canadian forward Tamara Tatham during the women's preliminary round group B basketball match Brazil vs Canada of the London 2012 Olympic Games on August 3, 2012 at the basketball arena in London. (Photo credit should read MARK RALSTON/AFP/GettyImages)

  • Catching Some Air

    LONDON, ENGLAND - AUGUST 03: Viachaslau Modzel of Belarus competes on the Men's Trampoline during Day 7 of the London 2012 Olympic Games at North Greenwich Arena on August 3, 2012 in London, England. (Photo by Cameron Spencer/Getty Images)

  • Gaining Speed

    LONDON, ENGLAND - AUGUST 03: Edward Clancy, Geraint Thomas, Steven Burke and Peter Kennaugh of Great Britain compete in the Men's Team Pursuit Track Cycling qualifying on Day 7 of the London 2012 Olympic Games at Velodrome on August 3, 2012 in London, England. (Photo by Jamie Squire/Getty Images)

  • Anyone's Ball

    United States' Alex Morgan, left, vies for the ball with New Zealand's Abby Erceg, right, during their women's quarter-final soccer match at St James' Park in Newcastle, England, during the London 2012 Summer Olympics, Friday, Aug. 3, 2012. (AP Photo/Scott Heppell)

  • Winning Reaction

    LONDON, ENGLAND - AUGUST 03: Xiaoxiang Dai of China celebrates after defeating Bubmin Kim of Korea in the Men's Individual Archery Quarterfinal match on Day 7 of the London 2012 Olympic Games at Lord's Cricket Ground on August 3, 2012 in London, England. (Photo by Paul Gilham/Getty Images)

  • Injured Goalie

    Goalkeeper Sreejesh Parattu Raveendran of India lies on the ground after getting injured during the men's field hockey preliminary round match between Germany and India at the Riverbank Arena in London on August 3, 2012, during the London 2012 Olympic Games. Germany beat India 5-2. (Photo credit INDRANIL MUKHERJEE/AFP/GettyImages)

  • Double Punch

    Tuvshinbat Byamba (L) of Mongolia defends against Alexis Vastine (R) of France in their round of 16 Welterwight (69kg) match of the London 2012 Olympic Games at the ExCel Arena on August 3, 2012 in London. Vastine was vawarded a close 13-12 points decision. (Photo credit JACK GUEZ/AFP/GettyImages)

  • Pointed Toes

    LONDON, ENGLAND - AUGUST 03: Minxia Wu of China competes in the Women's 3m Springboard Diving Preliminary Round on Day 7 of the London 2012 Olympic Games at the Aquatics Centre on August 3, 2012 in London, England. (Photo by Clive Rose/Getty Images)

  • Straight To The Face

    Ukraine's Taras Shelestyuk, left, punches Moldova's Vasilli Belous during a men's welterweight 69-kg preliminary boxing match at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Patrick Semansky)

  • Brazil Vs. China

    LONDON, ENGLAND - AUGUST 03: Maria Altheman of Brazil and Wen Tong of China compete in the Women's +78 kg Judo on Day 7 of the London 2012 Olympic Games at ExCeL on August 3, 2012 in London, England. (Photo by Quinn Rooney/Getty Images)

  • Eye On The Ball

    Netherlands' Jie Li returns serves o Egypt's Dina Meshref during the women's team table tennis competition at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Sergei Grits)

  • Successful Jump

    Lithuania's Austra Skujyte reacts after an attempt in the High Jump of the women's Heptathlon during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 3, 2012. (AP Photo/Matt Dunham)

  • Swinging The Hammer

    Canada's James Steacy makes an attempt in the men's Hammer Throw qualification during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 3, 2012. (AP Photo/Matt Dunham)

  • Diving For The Ball

    Sophie Van Gestel of the Netherlands digs out a ball during a beach volleyball match against Brazil at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Dave Martin)

  • China Vs. China

    China's Zhang Nan (Top) and Zhao Yunlei play against compatriots Xu Chen and Ma Jin during the Mixed Doubles gold medal match at the London 2012 Olympic Games in London, on August 3, 2012. (Photo credit ADEK BERRY/AFP/GettyImages)

  • Signaling Her Partner

    Larissa Franca from Brazil signals to her teammate during the Beach Volleyball match against Netherlands at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Petr David Josek)

  • Returning The Shot

    Austria's Jia Liu returns a shot to Hong Kong's Tie Yana during the women's team table tennis competition at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Sergei Grits)

  • A Helping Hand

    Sweden's coach Thomas Dennerby comforts Lisa Dahlkvist at the end of the women's soccer quarterfinal match against France at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in Glasgow, Scotland. (AP Photo/Vadim Ghirda)

  • Full Body Effort

    Argentina's Juan Ignacio Cerra makes an attempt in the men's Hammer Throw qualification during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 3, 2012. (AP Photo/Matt Dunham)

  • Going For The Block

    Sophie Van Gestel, left, from Netherlands looks on as her teammate Madelein Meppelink, center, tries to block Juliana Silva, left, from Brazil during their Beach Volleyball match at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Petr David Josek)

  • Taking It Hard

    Mongolia's Tugstosgt Nyambayar, right, reacts after defeating Italy's Vincenzo Picardi, left, during a men's flyweight 52-kg preliminary boxing match at the 2012 Summer Olympics, Friday, Aug. 3, 2012, in London. (AP Photo/Ng Han Guan)

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