Some top players in Queens, with everyone trying to get their share of practice before Wimbledon in 2 weeks. Berrettini (1) leads the field after QF performance in Roland Garros, but has been one of many to not play a match on grass for 2 years. Aside from Matteo Berrettini, there are a few other threats, and dark horses that we have not seen on grass before, like Aslan Karatsev.
Also, the return of Andy Murray is highly anticipated, and honestly has a reasonable first round against Frenchman Benoit Paire, before coming up against 1st seed Berrettini.
The Russian has not played a grass court match since 2015! Despite 6 years, I think Karatsev can continue to surprise people in 2021. He has surprised people on all surfaces so far, so there is no reason to think otherwise here, especially as most others are not regulars on grass too.
Denis Shapovalov (2)
Shapovalov was good, but not convincing in his recent grass performance in Stuttgart. The world no 14 dropped a set against Feli Lopez, and lost in straight sets against the eventual winner in Cilic, but is getting more practice than most. He likely plays Lopez in the second round, and if possibly Sinner in the Semi-Final.
The Italian does not have an easy draw, likely moving to the second round and facing the winner of Jeremy Chardy v Alexander Bublik, who are both big servers. From there, Sinner's draw gets more difficult, likely facing the winner of Brit Cameron Norrie and Aslan Karatsev.
Cilic is the hottest grass player at the moment, with a most recent title in Stuttgart on Sunday, not dropping a set. Cilic has a relatively easier draw, facing a qualifier in the first round, before likely coming up against Reilly Opelka, and then ultimately Matteo Berrettini theoretically. Ofcourse, as we all know, after a recent title winner, many can drop intensity and be on such a high, that they switch their mindset off. There is no reason to doubt Cilic to back up and perform here.
Dark Horse: Alexander Bublik
Bublik, when he wants to turn it on, has one of, if not the biggest serve in tennis. On grass, this is extremely important, and having recently made Roland Garros mens finals, it is fair to believe Bublik is switched on and ready to perform. Bublik has had one close match with Sinner, and a win and close loss to Shapovalov. Both players are likely in his way to final spot in the bottom half of the draw.