Romelu Lukaku is a familiar face to Premier League viewers, but the player who returned to Chelsea in a move worth ₤97.5 million ($134.7 million) on Thursday is, by his own admission, not the same one who departed England two years ago.

"Italy has brought me to another level," Lukaku said in May. "I have never felt this strong. I have reached another level, physically and mentally,”

The Belgian hit his peak during two years at Inter Milan after leaving Manchester United, and was central to the Italian club’s first Serie A title in 11 years last season.