Grigor Dimitrov of Bulgaria in action during his second round match against Ilya Ivashka of Belarus at the ATP 250 Geneva Open tennis tournament in Geneva, Switzerland, 19 May 2021. EPA-EFE/LAURENT GILLIERONCasper Ruud of Norway returns a ball to Tennys Sandgren of the US during their round of 16 men’s match, at the ATP 250 Geneva Open tournament in Geneva, Switzerland, 19 May 2021. The matches of the Geneva Open are played in front of 100 spectators due to preventive measures against the spread the coronavirus COVID-19. EPA-EFE/LAURENT GILLIERONDenis Shapovalov of Canada warms up before his second round match against Marco Cecchinato of Italy at the ATP 250 Geneva Open tennis tournament in Geneva, Switzerland, 19 May 2021. EPA-EFE/LAURENT GILLIERONGrigor Dimitrov of Bulgaria reacts during his second round match against Ilya Ivashka of Belarus at the ATP 250 Geneva Open tennis tournament in Geneva, Switzerland, 19 May 2021. EPA-EFE/LAURENT GILLIERONMarton Fucsovics of Hungaria celebrates winning a point to Dominic Stephan Stricker of Switzerland during their round of 16 (1/8 final) men’s match, at the ATP 250 Geneva Open tournament in Geneva, Switzerland, 19 May 2021. The matches of the Geneva Open are played in front of 100 spectators due to preventive measure against the spread the coronavirus COVID-19. EPA-EFE/LAURENT GILLIERON Tennys Sandgren of the US returns a ball to Casper Ruud of Norway during their round of 16 men’s match, at the ATP 250 Geneva Open tournament in Geneva, Switzerland, 19 May 2021. The matches of the Geneva Open are played in front of 100 spectators due to preventive measures against the spread the coronavirus COVID-19. EPA-EFE/LAURENT GILLIERONFabio Fognini of Italy returns a ball to Laslo Djere of Serbia during their round of 16 (1/8 final) men’s match, at the ATP 250 Geneva Open tournament in Geneva, Switzerland, 19 May 2021. The matches of the Geneva Open are played in front of 100 spectators due to preventive measure against the spread the coronavirus COVID-19. EPA-EFE/LAURENT GILLIERONDominic Stephan Stricker of Switzerland returns a ball to Marton Fucsovics of Hungaria during their round of 16 (1/8 final) men’s match, at the ATP 250 Geneva Open tournament in Geneva, Switzerland, 19 May 2021. The matches of the Geneva Open are played in front of 100 spectators due to preventive measure against the spread the coronavirus COVID-19. EPA-EFE/LAURENT GILLIERON