Coco Gauff beat China's Zheng Qinwen 3-6 6-4 7-6(2) in three hours to the become the youngest player to win the WTA Finals since Maria Sharapova in 2004 and the first American champion since Serena Williams 10 years ago.

Coco Gauff stunned world No. 1 Aryna Sabalenka in the semifinals of the WTA Finals on Friday, becoming the youngest player since 2010 to reach the final of this tournament.

World No. 3 Coco Gauff pulled off a stunning upset in the semifinals of the WTA Finals in Riyadh, beating World No. 1 Aryna Sabalenka 7-6(4), 6-3 to reach the championship match.

Coco Gauff, 20, became the youngest winner of WTA Finals since Sharapova achieved the feat in 2004, the same year Gauff was born

Coco Gauff beat China's Zheng Qinwen 3-6 6-4 7-6(2) in three hours to the become the youngest player to win the WTA Finals since Maria Sharapova in 2004 and the first American champion since Serena Williams 10 years ago.

Coco Gauff has 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 in Riyadh

Zheng Qinwen has defeated Wimbledon champion Barbora Krejcikova 6-3, 7-5 to book her place in the final of the WTA Finals in Riyadh

American Coco Gauff had a bitterly disappointing summer but on Saturday the youngster was able to celebrate lifting her first WTA Finals trophy, regaining her confidence after a string of frustrating defeats to end her year on a high note.