A long-running personal feud between Taiwanese doubles partners-turned-rivals Hsieh Su-wei and Chan Hao-ching boiled over during a US Open women's doubles match, with taunts, an on-court translation dispute and a pointed post-match handshake snub. Hsieh and her outspoken Latvian partner Jeļena Ostapenko beat Chan and Australia's Maya Joint 6-4, 6-4 in the Round of 16 at Flushing Meadows, but the tennis was overshadowed by the pair's off-court hostility, which drew attention to the tensions doubles rivalries can carry beyond the scoreline.

Mid-match, Ostapenko and Hsieh accused Chan's coach of sarcastically applauding their errors in Mandarin from the player's box; Hsieh translated the remarks for Ostapenko, who is not a Mandarin speaker, and demanded an official interpreter be brought to court. After sealing match point, Ostapenko celebrated by shouting towards Chan's box, and at the net Chan shook Ostapenko's hand but conspicuously ignored Hsieh. The rivalry reportedly stems from years of dispute over funding, sponsorship and coaching support within Taiwan's tennis association, which came to a head when Hsieh withdrew from the 2016 Rio Olympics after her coach was allegedly overlooked in favour of Chan and her sister, Latisha.