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BASEL, SWITZERLAND - AUGUST 22: Chen Long of China competes in the Men's Singles third round match against Ng Ka Long Angus of Hong Kong during day four 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 22: Chen Long of China competes in the Men's Singles third round match against Ng Ka Long Angus of Hong Kong during day four of the Total BWF World Championships at St. Jakobshalle on August 22, 2019 in Basel, Switzerland. (Photo by Shi Tang/Getty Images)