Chelsea boss Frank Lampard has been urged to switch to a back three to get the best out of Thiago Silva and ensure Antonio Rudiger remains at Chelsea.
Following the arrival of Silva from Paris Saint-Germain, Rudiger is yet to make an appearance for Chelsea.
“Frank Lampard needs to change his tactics or Chelsea can kiss goodbye to Antonio Rudiger,” Paul Merson told Daily Star.
“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.”
He added: “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.
“I’ve always been a big fan of Thiago Silva and signing him on a free was a no brainer. But at PSG he only had to exert himself four or five times a season.
“In the Premier League, it’s relentless. He needs to play in the centre of a three for me. And playing that way means Rudiger stays.”