Chelsea paid a whopping £97.5m to sign Romelu Lukaku from Inter Milan last summer.

The Belgian is the Blues record signing, but the 29-year-old failed to live up to expectations at Stamford Bridge.

The Belgian scored just eight Premier League goals in 26 appearances. And after a year at Chelsea, he has sealed a return to Inter Milan, howbeit on a season-long loan deal.

Romelu Lukaku has now admitted that joining Chelsea from Inter Milan last summer was a mistake.

“The biggest challenge of my career will be this season here,” he said at an event to present the new Inter shirts for the upcoming season.

“I left. It was a mistake, right Nico?” he jokingly asked teammate Nicolo Barella.

“Now I am happy to be wearing this jersey, the team knows what we need to do, it’ll be a great challenge this season and we need to continue like this.

“I realised last season when I was in England, just how important Inter are in the world. The club’s profile is improving on an international scale, the social media approach is really important too and you can see how we act in the locker room, in training, our hugs and jokes.

“Milan is a wonderful city and that is why I kept the old apartment when I went to London, because my mother was coming here all the time and I wanted to return too.”