Jessica Pegula upset world number one Aryna Sabalenka 6–4, 6–3 to win her second group stage match at the WTA Finals in Cancun on Tuesday and advanced to the semi-finals after Elena Rybakina edged Maria Sakkari 6–0, 6–7 (4–7), 7–6 (7–2) in the evening match.
Pegula, who came into the contest with a dismal 1–4 record against the hard-hitting Sabalenka, managed to absorb her powerful serve to extend rallies and thwart the Belarusian’s comeback attempts.
