Manchester United striker Romelu Lukaku could be struggling due to fatigue - according to his friends.
Lukaku's friends believe that he is being overworked by manager Jose Mourinho. The 25-year-old is just not fully fit, given his workload last season, the World Cup and in this campaign.
A United source is quoted by The Sun as saying: "He has played more than 60 games for club and country last season and needs a rest."