After surviving a tense opening-set tiebreak, the Filipina shifted into another gear to dismantle Croatia's Antonia Ruzic, 7-6(7), 7-5, and advance to the Hong Kong Open semifinals.
Jannik Sinner's partnership with coach Darren Cahill is ending after a spell that saw the Italian win five Grand Slam titles and achieve the No. 1 ranking.
Ben Shelton beat Arthur Rinderknech 3-6, 6-4, 7-6 (5) on Thursday for a season's best 43rd win and a spot in the Paris Masters quarterfinals. The US Open runner-up next faces No. 12 Tommy Paul in an all-American contest.