#1 Serena Williams
Serena Williams is the only woman to have won the French Open twice in her 30's. Remarkably, she has achieved this despite clay being her least preferred surface.
Williams won her first French Open title in 2002 beating her sister Venus in the final. She had to wait for 11 more years before winning the title again. She entered the tournament as the top-seed. She just dropped one set all tournament long as she beat maria Sharapova in straights sets in the final to lift the Suzanne Lenglen trophy. Serena was 30 years, 255 days old at the time.
In 2014, she was again the top-seed but was upset by young Garbine Muguruza in the second round. Fast-forward to 2015 and Serena maintained her top-seeding and started the tournament the overwhelming favorite. 5 of her 7 matches was decided in 3 sets and on 4 of those occasions, she dropped the first set. It was her hardest path to victory in any of her 23 Grand Slam triumphs. Williams was 32 years, 253 days old at the time of her victory.
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