@Kemarit - That's an interesting pick to be fair. He beat Federer this year in Italy and reached the final in Madrid after beating Nadal, but both of those are on Clay and I'm not sure he'll be able to compete with all the serve-and-volley play at Wimbledon.
I know, my tennis mates is giving me that kind of look when I told them that Tsitsipas should be a good player if he decided to concentrate on grass court, he has the built and the physically to be one of the best when Roger Federer retires. But it seems that he is focusing more on Clay, I guess he wanted to follow Nadal.
The problem with young and upcoming tennis prospect is that they succumb to the pressure of big tournaments. That's why even though that the top 3 players are getting older, there's no one who can take their place eventhough we have a lot of young players in the field.