Chelsea drew Lille in the round-of-16 of the competition.
The Blues initially drew Lille before UEFA declared the draw void due to a technical issue.
The draw was then repeated once again and luck was on Chelsea’s side after they drew Lille again in their respective group.
But club legend Joe Cole issues a warning to his former club that French side Lille should not be taken lightly.
‘Chelsea will be very, very happy with that but I’d put a word of caution on that because Lille are a very exciting, strong, aggressive team,’ Cole told BT Sport.
‘They have nothing to lose. Chelsea are the champions and are the hunted.
‘When Lille play, it can be one hell of an atmosphere. It’s going to be a tough one.
‘They’re probably breathing a sigh of relief to avoid Bayern Munich and Real Madrid and I get that, but you can’t discount this Lille team.
‘Lots of good, young players who will be fearless so Chelsea must be wary of an upset.’