Hsieh Su-wei and Chan Hao-ching have taken their on-court rivalry to social media following a doubles match at the U.S. Open. During the Round of 16 match on September 8, 2026, Hsieh and her partner Jelena Ostapenko defeated Chan and Maya Joint in straight sets, but Chan did not shake hands with Hsieh, highlighting a longstanding feud.
After the match, Ostapenko expressed her frustration towards Chan's player box. Hsieh later addressed the incident in a Facebook post, stating, "In recent matches against Taiwanese players, either the players like to provoke us, or their team/fans don’t understand even basic tennis etiquette." She mentioned that she joined in the yelling due to her partner's anger.
Chan responded on Instagram, explaining her reasons for not shaking hands. She claimed that she had previously waited for Hsieh to shake hands after matches but was repeatedly ignored. "It’s not a lack of sportsmanship; there’s just no need to wait for someone who doesn’t respect tennis etiquette," she wrote. Chan also accused Hsieh of hiring individuals to shout at her during a previous tournament, although she did not provide evidence for this claim.
Ostapenko appeared shocked by Chan's decision not to shake hands, raising her arms in confusion as Chan left the court. Reports indicate that Hsieh believes the Chinese Taipei Tennis Association has favored Chan and her sister Yung-Jan in terms of funding and resources.