To give Sascha fans some hope, let's remember this:
"Alexander Zverev was afraid of not being able to play the grass season. The world no. 3 suffered an injury to his left hamstring at the French Open during his loss to Dominic Thiem in the quarter-finals, and in his pre-tournament press conference at the Gerry Weber Open on Sunday, he admitted his relief for his injury to have healed much earlier than expected.
'Normally it takes about four weeks for this kind of injury to heal, but it took nine days. At first, I feared not being able to play Halle and Wimbledon at all,' said Zverev. 'Today, I trained properly for the first time and it was ok.
I'm happy to be able to play in the tournament.'"
https://www.tennisworldusa.org/tenn...-not-being-able-to-play-halle-and-wimbledon-/
Side note: he lost 6:1 6:4 to Coric in R1 of Halle. However, Coric won the tournament.