And, in a moment which will make all Red Devils fans wince, the £100m Manchester United target hit the deck as he tried to take a shot.
He was helped up by another friend after taking the tumble.
The Frenchman has been heavily linked with a move back to Old Trafford this summer as Jose Mourinho looks to restore the club to its previous glory.
He’s also had an exhausting summer with France at Euro 2016 – but he decided to spend his spare time yesterday exercising with Everton striker Lukaku.
The pair have been hanging out a lot recently – they were spotted out together in LA last week.
Click through the gallery above to see the photos.