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DOHA, QATAR - JANUARY 09: Miomir Kecmanovic of Serbia serves in his men's singles quarterfinal match against Marton Fucsovics of Hungary during day four of the ATP Qatar ExxonMobil Open at Khalifa International Tennis and Squash Complex on January 09, 2020 in Doha, Qatar. (Photo by Quality Sport Images/Getty Images)

DOHA, QATAR - JANUARY 09: Miomir Kecmanovic of Serbia serves in his men's singles quarterfinal match against Marton Fucsovics of Hungary during day four of the ATP Qatar ExxonMobil Open at Khalifa International Tennis and Squash Complex on January 09, 2020 in Doha, Qatar. (Photo by Quality Sport Images/Getty Images)