Jamie Carragher reveals one thing Chelsea can't afford to lose and it's not Christopher Nkunku

Jamie Carragher has heaped enormous credit on Mauricio Pochettino after the Chelsea boss ensured his side remained unbeaten against top four/five/six rivals following an immense 4-4 with Pep Guaridola. In one of the best games of the season, surpassing even the madness from last week's 4-1 win over Tottenham, Pochettino's men came from behind three times to stop the champions.

Taking the game to Guardiola's side despite starting the afternoon ten places behind and 12 points adrift of the table-toppers,Chelsea came from 1-0 down to lead in the first half before fighting back twice after the break to earn a well-deserved point. It means that after 12 matches, the Blues are still stranded in mid-table but haven't lost in their four meetings with sides competing for Champions League places.

When the win over Brighton in the Carabao Cup is added Chelsea have won two of five — drawing three — in encounters with Liverpool, Arsenal and now City. Four of those have been at home, something to take into account as they prepare for games with Newcastle and Manchester United on the road.

What it does, though, is it leaves them with the best record so far of any side against the so called top six. City lost to Arsenal, Arsenal lost to Newcastle, Newcastle lost to Liverpool, Liverpool lost to Tottenham and Tottenham were beaten by Chelsea. Nobody has beaten Chelsea out of those teams.

Aston Villa, currently fifth and ahead of Manchester United and the Magpies, did win at Stamford Bridge but also were defeated by Liverpool. United on the other hand have been near useless against the big sides, losing to City, Arsenal and Tottenham already.

This, for Chelsea, is a complete reversal on the mean from recent years after only picking up three