Former Bayern Munich midfielder Owen Hargreaves has questioned Chelsea's move for Bayer Leverkusen ace Kai Havertz.

Frank Lampard has already added Timo Werner and Hakim Ziyech, while their defence was shown to be highly vulnerable in a 7-1 aggregate defeat to Bayern Munich in the Champions League.

"He's a really good player," Hargreaves told BT Sport. "He's a great young player, but they have a lot of those great young players.

"I think they need some leaders in there. Havertz for £90 million, you want ready-made, walks in and makes you a better team and I think the worry is they spend right now £200 million on Werner, Ziyech and Havertz and they can still finish fourth or fifth.

"They want to win a title and I think Havertz is a special player but it feels like they need to sort out the keeper and the centre-backs first.

"Mason Mount could play in there, where does Mason then play? He's had a good season."