Shinji Kagawa has said that his initial experience of the Premier League has made him realise he needs to become physically stronger.
Kagawa, 23, signed for Manchester United from Borussia Dortmund this summer for £13 million, having impressed with his creative instincts in the Bundesliga.
The Japanese playmaker has made a promising start to his Red Devils career, although a back complaint sustained during international duty threatens to keep him out of this weekend's meeting with Wigan.
Quoted in the Daily Mail, Kagawa revealed he is focused on improving the physical side of his game. "I've realised that I need to limber up and strengthen my body.
"There are some tough games coming up. This injury may be due to travel and fatigue but I can get by if I take good care of my body."