Romelu Lukaku is a completely different player to the one we saw leave Chelsea in the summer of 2014.
The 28-year-old moved to Everton on a permanent basis seven years ago and left the Blues as a fairly inexperienced striker.
However, after signing for Chelsea yet again for a fee believed to be around £97.5million, Lukaku arrives back in west London as a more well-rounded centre-forward - and that's something that excites the club's fan base.
Lukaku's aerial ability, strength, awareness, positioning and his game understanding are all attributes that will have attracted Marina Granovskaia to spend big on the Belgium international.
But there is one key attribute that people perhaps don't associate too much with Lukaku, perhaps because of his 6'2 frame - his speed.
This is something that former Arsenal midfielder Paul Merson has warned opposition defences about as Lukaku prepares to make his debut against the Gunners next weekend.
“Lukaku will give Chelsea more of an edge too. He’s very good at rolling players and defenders are terrified of his pace,” Merson wrote for the Daily Star.
“All of a sudden space will open up for players like Mason Mount and Kai Havertz.
“Lukaku’s willing to chase balls down the channels as well, and we know he can score goals in this league.
“He is a great signing – and when you look at the strength of their squad it is obvious Chelsea are going to challenge [for the Premier League title].”
Chelsea boss Thomas Tuchel, when speaking to the club's official website about the Blues' new record signing, also mentioned Lukaku's speed as one of his key attributes, amongst other things.
"We are very happy to have Romelu back in the club as an addition to our squad," Tuchel said.
"We think in terms of personality, his speed, power, he can hopefully be an excellent choice for us and an excellent addition.
"He has the power, he has the physique to help us. He has the experience, the personality, to have an instant impact in our squad.
"He is at the same time a humble guy and a true team player and he cares about Chelsea."
Tuchel added: "He is super hungry. It was actually very important to us that it was his desire to re-join Chelsea and to finish his story at Chelsea in the way that he wants to for himself.
"It was very important because we have a strong group that is defined with a strong bond and a certain attitude to be ready to help each other out and to support each other.
"We think that Romelu, having always Chelsea in his heart, is a perfect addition to our group because he embodies all that we are proud of in this club and in our team."
