epa08651690 Novak Djokovic of Serbia (R) reacts as he waits for a decision by Head of Officiating at International Tennis Federation (ITF) Soeren Friemel (L), International Tennis Federation (ITF) with Andreas Egli (C) and Chair Umpire Aurelie Tourte after he accidentally hit a linesperson with a ball in the throat during his match against Pablo Carreno Busta of Spain (L) on the seventh day of the US Open Tennis Championships at the USTA National Tennis Center in Flushing Meadows, New York, USA, 06 September 2020. Djokovic was defaulted from tournament. Due to the coronavirus pandemic, the US Open is being played without fans and runs from 31 August through 13 September. EPA-EFE/JASON SZENES

epa08651781 Novak Djokovic of Serbia walks off the court after he accidentally hit a linesperson in the throat with a ball during a match against Pablo Carreno Busta of Spain on the seventh day of the US Open tennis championships at the USTA National Tennis Center in Flushing Meadows, New York, USA, 06 September 2020. Djokovic was defaulted from tournament. Due to the coronavirus pandemic, the US Open is being played without fans and runs from 31 August through 13 September. EPA-EFE/JASON SZENES