Chelsea facing the 'ultimate challenge' against Manchester City

Gary Cahill says Chelsea face the "ultimate challenge" when travelling to Premier League leaders Manchester City on Monday.

Chelsea on Wednesday night recorded a seventh clean sheet in nine games in all competitions in a goalless draw with West Ham which left Jose Mourinho so frustrated he described Sam Allardyce's tactics as from the 19th century.

Chelsea's Gary Cahill Credit: Press Association

City boast a 100 per cent record from 11 home games, scoring 42 goals in the process.

Gary Cahill told Chelsea TV: "They're banging goals in left, right and centre. It's going to be really tough. We had a really good result against them at home; away from home (at the Etihad Stadium) they've been so, so strong.

"I suppose it's the ultimate test. It's going to be a really, really tough game. We've got to try to look forward to those games and going there on Monday is exciting."