Timo Werner transfer is ‘great business’ for Chelsea says Fjortoft
Chelsea are keen on signing Bayer Leverkusen star Kai Havertz but a deal for the 20-year-old will reportedly scupper a move for another of Frank Lampard's top targets.
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"It's all great going forward, my worry is defensively," he told ESPN FC. "Chelsea - what we've seen under Frank Lampard - are at their best going forward.
"Because of having such a young squad, and certainly a young strike force, when they're not at it they've lost goals.
"It's fantastic for the fans to see exciting players being signed.
"But at some point, Frank has to at some point start thinking about what he's going to do defensively.
Chelsea also want to sign Leicester full-back Ben Chilwell (Image: GETTY)
"Azpilicueta has still got some more miles in him. If they sign Chilwell, he's a good defender. But they need a centre-back."
Chelsea return to Premier League action next weekend when they make the trip to Aston Villa.