CNN  —  American tennis sensation Coco Gauff ended her season in style Saturday, rallying to defeat China’s Zheng Qinwen 3-6 6-4 7-6 (2) to win the WTA Finals in Riyadh, Saudia Arabia. The 20-year-old capped a run that saw her become the youngest player since Maria Sharapova in 2004 to win the prestigious tournament reserved for the best players in the world. Gauff’s triumph brings with it an eye-popping prize of over $4.8 million dollars, the largest single prize in WTA history, according to