Maria Sharapova recently achieved this by winning her 4th major title at the French Open.
Louk Sorensen
Andy Murray. But he wasn't the first U.K. player to win a Grandslam.
Evonne Cawley was 20 when she became a professional tennis player.
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Currently the number one men's tennis champion is Novak Djokavic.
Justine Henin
The first tennis ball player was Freda Hendrik's from Massachusetts.
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She became a professional golf player in 2000.
Margaret Court
Martina Hingis
American tennis player Mary Pierce became famous for being a successful professional tennis player. She ended her career after winning four different Grand Slam events.