After going 0-2 in her first two matches, Pegula withdrew from her last match at the WTA Finals because of a left knee injury. Daria Kasatkina will replace her.
Iga Swiatek dispatched Daria Kasatkina 6-1, 6-0 to stay in the hunt for a spot in the WTA semi-finals in Riyadh.
Krejcikova will take on the number 2 player from the Purple Group Zheng Qinwen, while Coco Gauff will face world number 1 ...