By Nick Georgandis
Currently ranked No. 63 in the world, Belgium's Yanina Wickmayer turns 24. Wickmayer climbed as high as No. 12 in 2010, the year she reached the fourth round of the Australian Open and the third round of Roland Garros. She has won three career singles titles and was a semifinalist at the US Open in 2009.
Australia's tempestuous Bernard Tomic, currently ranked No. 52 in the world, turns 21. Tomic has one career title and has been ranked as high as No. 27 in the world. In 2011, he reached the quarterfinals at Wimbledon.
South Africa's Amanda Coetzer, a former Top 3 women's player, turns 42. Coetzer won nine career WTA titles and reached three different Grand Slam semifinals in her nine-year playing career. At 5 feet, 2 inches, she is the shortest woman to ever be ranked in the Top 5. She is one of only four players to ever beat Steffi Graf in Grand Slam play twice in the same year.