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Nikola Jokic of Serbia adjusts his mouthguard during the quarter-final match between Argentina and Serbia at the 2019 FIBA World Cup in Dongguan, south China's Guangdong Province, on Sept. 10, 2019. (Xinhua/Deng Hua)
Nikola Jokic of Serbia adjusts his mouthguard during the quarter-final match between Argentina and Serbia at the 2019 FIBA World Cup in Dongguan, south China's Guangdong Province, on Sept. 10, 2019. (Xinhua/Deng Hua)