Lukaku joined Chelsea from from Anderlecht in 2011 before finally leaving the club permanently for Everton in the summer of 2014.
However, Inter Milan striker Romelu Lukaku credits former Chelsea team-mates Didier Drogba and Nicolas Anelka with helping to turn him into the fearsome striker he is today.
Lukaku told Bleacher Report: “Everything happened quickly there.
“I was only 18 years old, I had just finished high school three months earlier, I had graduated and suddenly I was already on the train to London.
“There I met Didier Drogba, he was doing physiotherapy. He told me immediately that I had to show him the ‘Blue’ character. From that day on we started talking every day for at least an hour, before training, after training.
“He, Anelka and every other player in that locker room showed me what it takes to become the person I am today. It wasn’t so much the coach as the players, they had a mentality that made them say ‘OK, let’s go win’.
“It was a great experience, I saw how they won the Champions League, the FA Cup and this has served me well so far.”