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Joao Sousa of Portugal hits a return against Filip Krajinovic of Serbia during their first round men's singles match at the Shanghai Masters tennis tournament in Shanghai on October 6, 2019. (Photo by HECTOR RETAMAL / AFP) (Photo by HECTOR RETAMAL/AFP via Getty Images)

Joao Sousa of Portugal hits a return against Filip Krajinovic of Serbia during their first round men's singles match at the Shanghai Masters tennis tournament in Shanghai on October 6, 2019. (Photo by HECTOR RETAMAL / AFP) (Photo by HECTOR RETAMAL/AFP via Getty Images)