Romelu Lukaku appears delighted to be back at Manchester United following his impressive campaign at the World Cup with Belgium.
Lukaku, who returned to United training on Monday after enjoying his holidays following his exertions in Russia, is currently gearing up for the upcoming Premier League season.
And he has been hard at work at United's Carrington training base alongside his team-mates, especially Nemanja Matic and Alexis Sanchez.
The Belgium international uploaded a video onto his Instagram story of Matic getting his body fat measured while the latter wore nothing but pants and sunglasses.
And the striker can amusingly be heard shouting down the camera: 'Damn boy, zero per cent fat... zero!'
Meanwhile, Lukaku is also continuing to grow his already strong friendship with Chile star Sanchez off the pitch.
25-year-old Lukaku filmed his 'friend' Sanchez working out in the gym, while jokingly using an endearing Instagram filter.
Jose Mourinho's side begin their Premier League campaign against Leicester on Friday night after enduring a difficult pre-season.
The Red Devils only won one of their pre-season matches in normal time - against Real Madrid - and will be thankful to have Lukaku and the rest of their World Cup stars back training.
