Former Chelsea midfielder Joe Cole claimed the Blues had 'so much strength in depth' after they opened their defence of the Champions League with a 1-0 victory over Zenit St Petersburg at Stamford Bridge.
Thomas Tuchel's side were far from their best but still had enough to claim a deserved victory on Tuesday night.
Romelu Lukaku finally pierced Zenit's stubborn resistance when he headed in at the far post from Cesar Azpilicueta's cross in the 69th minute.
Thomas Tuchel's side were far from their best but still had enough to beat Zenit St Petersburg
Cole told BT Sport: 'They'll be feeling great.