Manchester United midfielder Shinji Kagawa admits he needs to toughen up if he is to make an impact at Old Trafford. The former Borussia Dortmund playmaker has struggled to establish himself at Old Trafford since his £12m move in summer 2012.

He told United's official website: "I think I can still improve my strength. I'm not the tallest or biggest player, so I have to move my body more.

"Smaller players in the Premier League are very good at using their bodies (to get past the opposition) and that's what I will continue to do.

"I realise the Premier League is a very tough league and I know I have to be stronger."

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