Chelsea fear losing midfielder Frank Lampard in the summer.
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The Sun says Chelsea already have Werder Bremen ace Diego lined up as Lamps' replacement as he continues to baulk at opening new contract talks.
A club insider told The Sun: "Frank's one of our most loyal players yet, unbelievably, there is still no sign of a new contract, even though we all know he can go on a Bosman soon as he has one year left on his present deal.
"Now there's a real fear the club are ready to lose him and bring in a Brazilian who has no experience of the English game."
