The Italian player had the illusion to be able to win Wimbledon but Djokovic really was extraordinary yesterday. Still I believe Berretini's an excellent player, he's young and might be able to become a top player.
Federer, Nadal and Djokovic won't play forever
In fact, Djokovic did not play his best tennis in the semifinals and finals, but that is also a characteristic of great champions, that they win even when they don't play at their usual level.
Berretini was very good but it is always very difficult to play such big and important matches.
The psychological pressure is huge and it is not easy for a young player to play such a match.
I'm sure that the Italian will be even better in the future and that he will soon start winning his first GS tournaments.
Personally, I think that Federer's time has passed and that he will no longer win any GS tournaments while Nadal has a chance only in Paris.
This year is a great chance for Nadal to win the golden slam, which no one has ever managed to win, and after that he can retire as a GOAT.