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Ivo Karlovic

Is It Legal? Yes. Ethical? Perhaps. Underhanded? Definitely.

Christopher Michaelson, Ph.D. | Posted 10.19.2013 | Sports
Christopher Michaelson, Ph.D.

As tennis players gear up for their next Grand Slam, the U.S. Open, here's a bit of now obscure Slam history: The most famous underhand serve in the history of tennis remains Michael Chang's deft trickery that unnerved a choking Ivan Lendl in 1989 French Open.

WATCH: Fastest Serve In Tennis History

AP/The Huffington Post | Posted 05.25.2011 | Sports

ZAGREB, Croatia -- The International Tennis Federation says Croatia's Ivo Karlovic set a world record with a 156 mph serve Saturday during a Davis Cup...