Chelsea hero Joe Cole says the signing of Romelu Lukaku turns Thomas Tuchel's side into title contenders.
The goalscoring machine completed a club-record £98m switch from Inter Milan on Thursday.
Speaking to The Sun, Cole said: "I think it puts them right on the level with Manchester City, especially if they don't do anything more.
"I look at the Chelsea squad now and don't see any weaknesses.
"If you look at last season and look at it very crudely, even though they won the Champions League, the top scorer finished with seven goals. So it's evident they needed a goalscorer and Lukaku's a goalscorer.
"Not only that, but he is the complete focal point of an attack.
"Chelsea have an abundance of players who can play in and around him. They are now real contenders."
Cole added: "He has matured massively as a player. He has come into his own. Since he left Chelsea he's scored goals wherever he's gone.
"He has been a huge player for Belgium, he's won trophies and he is now not only a winner but a leader.
"When he was at Chelsea he was heir to Didier Drogba's throne and now he has grown into that."