WTA roundup: Coco Gauff takes down Jessica Pegula at WTA Finals; Liu beats Eala to win Hong Kong Tennis Open

Coco Gauff opened the WTA Finals with a stellar 6-4, 6-7 (5), 6-2 victory over No. 5 seed and fellow American Jessica Pegula on Sunday in Indian Wells. Meanwhile, Claire Liu won her first WTA Tour event, stunning No. 2…