Andy Murray believes Matteo Berrettini can forget about winning majors until he improves his return.
Murray lost to top seed Berrettini at Queen's this week, although he was some way short of his best after yet another injury lay-off.
He was interested in checking the progress of the Italian, though, with many tipping him to be a major contender at Wimbledon this year.
Murray, though, thinks Berrettini has a major flaw that could hold back his aspirations to win a major for now.
"He has a huge serve," Murray said of Berrettini. "Obviously I played against him a couple years ago and [have] seen his matches.
"He has that big weapon, and that always gives you opportunities in matches, especially on this surface. Usually Wimbledon is slightly slower than the courts at Queen's.
"But yeah, he has a big game. [It] just depends how well he can return and how his groundies (ground strokes) hold up right at the highest level.
"He serves huge and it's obviously very tough to break him, but he's going to have to do well on the return games.
"And that's something that I think at the top, top level has maybe held him back a little bit.
"Yeah, that's something that he'll need to improve if he wants to win one of the majors, I think."
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