But Djokovic was wrestling with the obvious: he was about to be thrown out of the 2020 US Open. A few months later at the ATP World Tour Finals in London, he hit a ball into the crowd. Federer took the opportunity to have a second knee operation and withdrew from the season. Djokovic knew that if he stayed fit he could make up valuable ground on both of them. As Alexander Zverev pointed out, Djokovic was the only grand slam title winner left in a weakened field.

Source: The Guardian September 07, 2020 12:56 UTC