Chelsea legend and technical advisor Petr Cech has explained how Romelu Lukaku has improved since his first spell at the club.

Cech played alongside Lukaku when he arrived at Stamford Bridge as a teenager.

The Belgian, now 28, has returned to west London from Inter Milan, and Cech is excited about the impact he can have on Thomas Tuchel's side.

Cech wrote in a column for the club's website: "When Romelu arrived at Chelsea, his hold-up game was not the same as it is now, because at Anderlecht he was used to concentrating on running. He would get the ball and kill everybody with speed, power and his finishing. At Chelsea at that time, we used the number nine in a slightly different way for the hold-up play, and also it's a more challenging league than Belgium.

"He needed a little bit of time to adapt, his career took a different path and he's been successful everywhere he's been. Over the years he has obviously improved and you can see when he talks that he was conscious about needing to improve this part of his game.

"And he's done it, so that is credit to him, and we are delighted to have him back. He knows what he's coming in to and probably has a little bit of unfinished business here which he can nicely complete if everything goes the way we all wish.

"Everybody's path is different and it shows that if things are not working at the beginning, you should not dismiss any opportunities or different pathways."