Frank Lampard has warned his Chelsea players that they must be prepared to suffer in their Champions League last-16 tie against Bayern Munich - in much the same way he survived a painful two-footed challenge from his own captain Cesar Azpilicueta.

Bayern manager Hans-Dieter Flick has claimed striker Robert Lewandowski is in the form of his life, having scored 38 goals in 32 games for the German club this season, and the Bundelsiga leaders are 11 games unbeaten.

Despite beating Tottenham Hotspur on Saturday, Lampard knows Chelsea will have to find another level to get past Bayern and their desire was perhaps best illustrated by Azpilicueta’s two-footed tackle on his head coach during their final training session ahead of Tuesday night’s first leg.

Just as Lampard was forced to suffer in training, the Chelsea players can expect to be put under pressure by their visitors at Stamford Bridge.

“A big part of my job is to explain to the players that, over two legs, we need to be at our maximum,” said Lampard. “So going into the game we must make sure every box is ticked in both games.

“Bayern Munich are an incredible side with the ball. They’ve got some really talented players who keep the ball and use the ball well. If we have to suffer, we have to suffer. That’s our job over the next two games.”

On Azpilicueta’s over-exuberance, Lampard added: “Thank God it was Azpi because he’s in the team regularly. I’d be worried if it was someone who wasn’t playing a lot, going in with two feet! We’re feeling strong and focused. But we have to deliver. Deliver that attitude you saw in Azpi’s challenge. That needs to be delivered, but maybe not with two feet!”