Coco Gauff's biggest payday in tennis came at the WTA Finals in Riyadh when she defeated Zheng Qinwen 3-6, 6-4, 7-6(2) to earn a cheque of $4.805m.
Serena Williams has disclosed that she recently underwent surgery to remove a branchial cyst from her neck, which was "the size of a small grapefruit."
Serena Williams thanked Andy Murray for his support for women in a message congratulating him on his career.
Coco Gauff followed in Serena Williams' footsteps when she became just the second teenager since 2001 to reach the US Open semi-finals.