Serena Williams: Top-Ranked Professional Tennis Player

The star athlete took a lengthy hiatus from the tennis court following her shocking loss at the U.S. Open in September 2015. According to her coach, Patrick Mouratoglou, Williams was suffering from depression and needed time to recover from a knee injury. ”I definitely have not been happy,” Williams said. “Especially when I had that second surgery, I was definitely depressed. I cried all the time. I was miserable to be around.”