Chelsea boss Frank Lampard has been warned that he will be spending “dead money” if he signs Kalidou Koulibaly this summer.Many Blues fans want Frank Lampard to strengthen his defence with Chelsea being leaky at the back this season.They conceded seven across two legs as they were knocked out of the Champions League by Bayern Munich in the last 16 with 79 goals let in across all competitions this season.Napoli defender Koulibaly has been linked with a move to Stamford Bridge though the Serie A outfit are expected to demand around £80m for the centre-back.Though former Manchester United defender Rio Ferdinand believes the cash would be wasted if Chelsea spend it on Koulibaly.Ferdinand said: “The problem with Koulibaly, he’s 29-years-old,.
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