Coco Gauff won the WTA Finals for the first time by rallying to beat Olympic champion Zheng Qinwen 3-6, 6-4, 7-6 (2) in the final on Saturday. Zheng threatened a comeback but Gauff took the victory off her third match point with a forehand winner as she came into the net. Gauff beat the world’s top two players — Aryna Sabalenka and Iga Swiatek — on her run to the final at the season-ending event in Riyadh.