BELGRADE, SERBIA - APRIL 23: Filip Krajinovic of Serbia plays a backhand during the quarterfinals match against Matteo Berrettini of Italy at Novak Tennis Centre on April 23, 2021 in Belgrade, Serbia. (Photo by Srdjan Stevanovic/Getty Images)
BELGRADE, SERBIA - APRIL 23: Filip Krajinovic of Serbia plays a backhand during the quarterfinals match against Matteo Berrettini of Italy at Novak Tennis Centre on April 23, 2021 in Belgrade, Serbia. (Photo by Srdjan Stevanovic/Getty Images)