After her match on Tuesday, Coco Gauff, the No. 4 player in the world with two Grand Slams and 11 titles already on her resume, said she felt like a victim of “imposter syndrome.” “I think it just shows, like my mind, and it's just all about mentality out there at the end of the day,’’ she said. “And I think I have to believe that I belong where I am. I think sometimes I can get imposter syndrome.