Four-time Grand Slam champion Iga Swiatek beat American Coco Gauff in straight sets at the WTA Finals in Mexico.
A litany of unforced errors from Aryna Sabalenka saw Jessica Pegula defeat the world number one in straight sets at the WTA Finals in Mexico on Tuesday.
World number two Iga Swiatek beat Wimbledon champion Marketa Vondrousova 7-6 6-0 in her opening match at the WTA Finals in Cancun, before joining the chorus of criticism of the court.
World number one Aryna Sabalenka and American Jessica Pegula both won their opening matchesat the WTA Finals on Sunday.