Zheng Qinwen cruised to a 6-1, 6-1 win over Jasmine Paolini to reach the semifinals of the WTA Finals on Wednesday. Zheng needed just over an hour to defeat Paolini in the match that decided the final qualifier from the Purple Group at the season-ending tournament for the top-ranked women's players.

RIYADH, Saudi Arabia — Jessica Pegula withdrew from her last match at the WTA Finals because of a left knee injury on Wednesday. The American, who lost her first two matches and was already eliminated from semifinal contention at the season-ending tournament, will be replaced in the Orange Group by first alternate and ninth-ranked Daria Kasatkina.