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BASEL, SWITZERLAND - AUGUST 23: Chou Tien Chen of Chinese Taipei reacts in the Men's Singles quarter finals match against Kantaphon Wangcharoen of Thailand during day five of the Total BWF World Championships at St. Jakobshalle on August 22, 2019 in Basel, Switzerland. (Photo by Shi Tang/Getty Images)

BASEL, SWITZERLAND - AUGUST 23: Chou Tien Chen of Chinese Taipei reacts in the Men's Singles quarter finals match against Kantaphon Wangcharoen of Thailand during day five of the Total BWF World Championships at St. Jakobshalle on August 22, 2019 in Basel, Switzerland. (Photo by Shi Tang/Getty Images)