 Coco Gauff just lost again at Wimbledon before the quarterfinals. She's never reached the quarterfinals. Remember, she had her breakout five years ago in her first ever Grand Slam tournament, and she made it to the fourth round of Wimbledon. We're all talking about Coco Gauff. She did win the U.S. Open last year. But let's face it, in tennis, by far the biggest stage is Wimbledon.