Frank Lampard has been urged to switch to a back three to help combat Chelsea’s leaky defence.

Former Arsenal player Paul Merson wants centre-back Antonio Rudiger back into the squad.

Merson told The Star: “Frank Lampard needs to change his tactics or Chelsea can kiss goodbye to Antonio Rudige.

“Chelsea have got five centre-backs and that’s too many unless you’re playing three every week – and I think that’s what Lampard should do.

“At the moment he’s playing a back four and someone is always going to miss out. Right now it’s Rudiger, which surprises me.

“I thought Kurt Zouma or Andreas Christensen would go this summer because Rudiger is better than both of them.

“But he can’t even get on the bench. If that carries on he’ll be gone. He won’t want to stick around to be fifth choice.

“But if Lampard switches to three at the back with wing-backs, he solves the problem and gets the best out of Thiago Silva, who won’t be so exposed in that system.”