Arthur Ashe. The first African-American tennis pro to achieve a number-one ranking was more than just a force on the court. After graduating from UCLA with a degree in business administration, Ashe went on to become a major civil rights activist and dedicated much of his life to bringing down apartheid in South Africa. Respect.

Billie Jean King. Best known as champion of the infamous "Battle of the Sexes," King got her start playing collegiately at CSU Los Angeles. Over her illustrious playing career, King managed to win all four majors. She's still one of just ten women to do so.

James Blake. Blake is a pretty smart dude—he attended Harvard University on a tennis scholarship. Although he's now retired from professional tennis, he'll always be remembered for his ridiculously intense U.S. Open quarterfinal matchup against fellow American Andre Agassi in 2005.

John Isner. For those of you sporadic Wimbledon watchers, you might remember Isner as the ridiculously tall dude who won the longest match in tennis history. It lasted a grand total of eleven hours and five minutes. He must have trained extra hard when he was a student-athlete at the University of Georgia.

Mike and Bob Bryan. Evidently, identical twins make good doubles partners. After helping Stanford University win back-to-back NCAA championships, the Bryan brothers extended their dominance to the pro circuit. They completed the Grand Slam, won the Olympic gold, and currently hold the record for most ATP doubles titles. Twin telepathy, perhaps?