Raphael Varane will join Manchester United by next week.
The French World Cup winner has decided to not extend his stay at Los Blancos and opt for a new challenge this summer.
He will be moving to Old Trafford after both Man United and Real Madrid have reached an agreement over an initial £34.2m fee.
Danny Mills is doubtful of Varane adapting to the Premier League instantly.
“It will take him a little bit of time, certainly, to adapt to Manchester, Manchester weather,” he told Sky Sports. “But I think more importantly, the Premier League.
“We know that he’s won everything. He’s had one or two injury problems. He hasn’t played every single game, every single season. He has had those injury issues in the last few years and I think it might take him a little bit of time, maybe just to adjust to the robustness of the Premier League.
“We’ve seen how it’s difficult sometimes for defenders to get to grips with the physicality of it, the intensity of the games.
“I’m sure there’s a lot of games in La Liga where he’s been able to coast through at times. That does not happen in the Premier League and you have to get used to that quite quickly.”
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