Shinji Kagawa could be key for Manchester United in their race to land Borussia Dortmund striker Robert Lewandowski.

Bayern Munich, Manchester City and Inter Milan are also showing interest in the young Pole.

But the Mail on Sunday says Dortmund have tried to get him to sign a new deal but it is believed the player would prefer to follow in the footsteps of Shinji Kagawa to Old Trafford.