But it looks good that Zverev will take part in the Davis Cup in Hamburg, Germany in September.
Chances were indeed very low. In order to play such a tournament you have to be in the best shape possible. He couldn't achieve that after his injury and having surgery. The ankle is such a critical joint for the tennis player. All the balance and movements is coordinated with the ankles.
It is sad to not see him playing there. I think he could have played a good role on hard court even against Nadal. Against Djokovic I am not so sure, I think Djokovic would take it home if he is allowed to play.
The names that many spectators are interested in are somehow dwindling recently. Nadal is injured more and more often, Federer doesn't return, Djokovic is not allowed to play and some players are injured or not playing consistently on a high level. In a couple of years the time of Djokovic and Nadal will also be over. I think the tennis world will be quite different by then and less people will be watching it.
I personally started watching tennis quite a lot exactly because of players like Federer. But that's how it is in sports. Messi and Ronaldo are soon gone. Schumacher was once gone in Formula 1 and Hamilton will also soon be gone. Hopefully those gaps will be filled with new superstars.