LONDON — Misty May-Treanor danced on the sand and then off it, leaving Horse Guards Parade with Kerri Walsh Jennings and a third gold medal.

Playing in the Summer Games together for the last time, the twice-defending champions extended their unbeaten streak to 21 in a row – through Athens, Beijing and now London – by defeating Jennifer Kessy and April Ross 21-16, 21-16 in an all-American final on Wednesday night.

The match started with nearby Big Ben pealing the hour and ended with the "Star-Spangled Banner" rising from the iconic venue in the Prime Minister's backyard, just down the Mall from the royal residence at Buckingham Palace. Playing on Henry VIII's former jousting tiltyard, with the current Prince Harry in the crowd, Walsh Jennings and May-Treanor continued their reign as champions of the beach.

"It's insane. It doesn't feel like it's real," Walsh Jennings said. "I told Misty when we were getting our medals: 'If I wake up tomorrow and we have to replay this match, I'm going to be furious.' Because it feels like I'm in a dream.

"It truly feels surreal and it didn't feel like that the first two times for whatever reason. But this, it's almost too good to be true."

Dominating the sport for three Olympiads, Walsh Jennings and May-Treanor have won every match they've ever played at the Summer Games and lost just one of 43 sets.

No one had ever won even two beach volleyball gold medals before the Americans won their second straight in Beijing.

No woman had ever won three Olympic beach volleyball medals of any kind.

"I know how hard it is to win one tournament. And the amount of tournaments they've won is crazy," said Kessy, who jumped for joy on the medal podium after she and Ross won silver in their Olympic debuts. "For them to do it for years and years and to be on top is just really impressive. We learn a lot from them."

Earlier Wednesday, Brazil's Juliana and Larissa beat Xue Chen and Zhang Xi of China to win the bronze.

Brazil's Emanuel and Alison were scheduled to play Julius Brink and Jonas Reckermann of Germany in the men's gold-medal match on Thursday night. Martins Plavins and Janis Smedins of Latvia were to play Reinder Nummerdor and Rich Schuil of the Netherlands for the men's bronze.

Walsh Jennings and May-Treanor pulled away midway through the first set of the title match and were never threatened in the second, falling to their knees and hugging as Ross' serve went long on match point. Then they took the celebration to the stands, circling the stadium that was built on the 500-year-old parade grounds now used by the Queen's household cavalry.

Walsh Jennings covered her bare shoulders with an American flag and grabbed her children; the older one was a little scared. They high-fived the Horse Guards Parade Dance Team and volunteers and just about anyone holding an American flag.

And, with both teams in the final from the United States, there were a lot of them.

"It's one thing to play an Olympic final. It's another to play against a team from your county you know so well," said Walsh Jennings, who played with Kessy on a U.S. junior team.

"I think the only reason Misty and I are gold medalists is because of those two. They push us so hard. They're one of my favorite teams to beat because they're so good. They've been one of the top teams in the world since they got together. I'm just really grateful that we've had them to come up against because they've made a big difference in our career."

May-Treanor returned to the sand for a funky jig to rival the scantily clad dance team that helped bring the beach party atmosphere to the sold-out crowds in central London.

"I was like, 'I hope I'm not rubbing it in anybody's face,' but I was so excited," said May-Treanor, a competitor on "Dancing with the Stars" in 2008 before she tore her left Achilles tendon in rehearsal and missed a year on the pro tour. "I just had to get out there and let it out."

May-Treanor said she will retire to raise a family with her husband, Los Angeles Dodgers catcher Matt Treanor, who watched the gold-medal match in the team's clubhouse on a balky Internet connection that made him miss the final few points.

"I'm just real proud of her," he said in the Dodger Stadium dugout. "I am sure she is much more comfortable on the court than I am watching her."

During the medal ceremony, the four Americans hugged after receiving their prizes and stood facing the two American flags raised during the national anthem. Despite both a shutout in the men's tournament, the United States matched its best finish since beach volleyball was added to the Olympics in 1996.

"I'm happy to be sitting next to another American team up here," May-Treanor said. "For both of us to be in the gold-medal match, it says a lot about our sport, a lot about the teams up here. ... I'm proud about both of us. And I'm just happy about the four of us really sharing this moment. They have no reason to hang their heads down."

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AP freelancer Joe Resnick in Los Angeles contributed to this report.

Loading Slideshow...
  • Kerri Walsh Jennings

    Kerri Walsh Jennings sets the ball during the women's Gold Medal beach volleyball match between two United States teams at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Misty May-Treanor

    Misty May-Treanor digs out a ball during the women's Gold Medal beach volleyball match between two United States teams at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Kerri Walsh Jennings

    Kerri Walsh Jennings reacts after scoring a point during the women's Gold Medal beach volleyball match between two United States teams at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • April Ross

    April Ross, rear, hugs teammate Jennifer Kessy during the women's Gold Medal beach volleyball match between two United States teams at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Jennifer Kessysets

    United States' Jennifer Kessysets a ball during the women's gold medal beach volleyball match against the other US team at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Kerri Walsh Jennings

    United States' Kerri Walsh Jennings reacts during the women's gold medal beach volleyball match against the other US team at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Jennifer Kessy

    United States' Jennifer Kessy, front, and April Ross, back react during the women's gold medal beach volleyball match against the other US team at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Kerri Walsh Jennings

    United States' Kerri Walsh Jennings, right, looks on as Misty May-Treanor, left, dives for a ball during the women's gold medal beach volleyball match against the other US team at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Misty May-Treanor

    United States' Misty May-Treanor dives for a ball during the women's gold medal beach volleyball match against the other US team at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Jennifer Kessy

    United States' Jennifer Kessy, left, looks on as April Ross, right, reaches for a ball during the women's gold medal beach volleyball match against the other US team at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Kerri Walsh Jennings

    United States' Kerri Walsh Jennings, right, lsets a ball for Misty May-Treanor, left, during the women's gold medal beach volleyball match against the other US team at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Kerri Walsh Jennings

    United States' Kerri Walsh Jennings reacts during the women's gold medal beach volleyball match against the other US team at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • April Ross

    April Ross of the United States lunges for the ball in the Women's Beach Volleyball Gold medal match against the United States on Day 12 of the London 2012 Olympic Games at the Horse Guard's Parade on August 8, 2012 in London, England.

  • Misty May-Treanor

    Misty May-Treanor and Kerri Walsh Jennings of the United States celebrate a point during the Women's Beach Volleyball Gold medal match against the United States on Day 12 of the London 2012 Olympic Games at the Horse Guard's Parade on August 8, 2012 in London, England.

  • Kerri Walsh Jennings

    Kerri Walsh Jennings of the United States competes against April Ross of the United States during the Women's Beach Volleyball on Day 12 of the London 2012 Olympic Games at the Horse Guard's Parade on August 8, 2012 in London, England.

  • Misty May-Treanor

    Misty May-Treanor and Kerri Walsh Jennings of the United States celebrate a point during the Women's Beach Volleyball Gold medal match against the United States on Day 12 of the London 2012 Olympic Games at the Horse Guard's Parade on August 8, 2012 in London, England.

  • Kerri Walsh Jennings

    Kerri Walsh Jennings of the United States dives for the ball during the Women's Beach Volleyball Gold medal match against the United States on Day 12 of the London 2012 Olympic Games at the Horse Guard's Parade on August 8, 2012 in London, England.

  • Jennifer Kessy

    Jennifer Kessy and April Ross of the United States celebrate a point during the Women's Beach Volleyball Gold medal match on Day 12 of the London 2012 Olympic Games at the Horse Guard's Parade on August 8, 2012 in London, England.

  • Jennifer Kessy

    Jennifer Kessy and April Ross of the United States celebrate a point during the Women's Beach Volleyball Gold medal match on Day 12 of the London 2012 Olympic Games at the Horse Guard's Parade on August 8, 2012 in London, England.

  • Misty May-Treanor

    Misty May-Treanor of the United States hits the ball during the Women's Beach Volleyball Gold medal match against the United States on Day 12 of the London 2012 Olympic Games at the Horse Guard's Parade on August 8, 2012 in London, England.

  • April Ross

    April Ross of the United States celebrates a point during the Women's Beach Volleyball Gold medal match on Day 12 of the London 2012 Olympic Games at the Horse Guard's Parade on August 8, 2012 in London, England.

  • Kerri Walsh Jennings, Misty May-Treanor

    Misty May-Treanor reacts after she and teammate Kerri Walsh Jennings beat April Ross and Jennifer Kessy during the women's Gold Medal beach volleyball match between two United States teams at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Misty May-Treanor

    Misty May-Treanor reacts after she and teammate Kerri Walsh Jennings beat April Ross and Jennifer Kessy during the women's Gold Medal beach volleyball match between two United States teams at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • April Ross

    April Ross reacts near the end of a loss to Missy May Treanor and Kerri Walsh Jennings during the women's Gold Medal beach volleyball match between two United States teams at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Jennifer Kessy

    United States' Jennifer Kessy, left, looks on as April Ross, right, reaches for a ball during the women's gold medal beach volleyball match against the other US team at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Kerri Walsh Jennings, Misty May-Treanor

    Misty May-Treanor celebrates after she and teammate Kerri Walsh Jennings beat April Ross and Jennifer Kessy during the women's Gold Medal beach volleyball match between two United States teams at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Jennifer Kessy, April Ross

    The United States' Jennifer Kessy, left, and April Ross celebrate with their Silver medals during the women's beach volleyball medal ceremonies at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Team USA

    United States' Misty May-Treanor, 2nd right, and Kerri Walsh Jennings,left, hug with Jennifer Kessy, 2nd left, and April Ross, right, also from Unitade States after their women's gold medal beach volleyball match at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Kerri Walsh Jennings

    Kerri Walsh Jennings kisses her gold medal following a win over Jennifer Kessy and April Ross in the women's Gold Medal beach volleyball match between two United States teams at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Kerri Walsh Jennings, Misty May-Treanor

    The United State's Missy May-Treanor, left, and Kerri Walsh Jennings celebrate with their Gold Medals following a win over April Ross and Jennifer Kessy in the women's Gold Medal beach volleyball match between two United States teams at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Olympic Beach Volleyball

    Women's beach volleyball medalists listen to the USA national anthem following the Gold Medal match between two United States teams during at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Misty-May Treanor

    The United State's Misty May-Treanor, left, and Kerri Walsh Jennings acknowledge the crowd with their Gold Medals following a win over April Ross and Jennifer Kessy in the women's Gold Medal beach volleyball match between two United States teams at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Kerri Walsh Jennings

    United States' Kerri Walsh Jennings celebrates with her boys Joey and Sundance after winning the women's gold medal beach volleyball match at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Misty May-Treanor

    United States' Misty May-Treanor celebrates with her fans and friends after winning the women's gold medal beach volleyball match at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.

  • Misty May-Treanor, Kerri Walsh Jennings

    The United State's Misty May-Treanor, left, and Kerri Walsh Jennings celebrate with their Gold Medals following a win over April Ross and Jennifer Kessy, also of the United States, in the women's Gold Medal beach volleyball match at the 2012 Summer Olympics, Wednesday, Aug. 8, 2012, in London.