Chelsea defeated Lille 2-1 at the Stade Pierre-Mauroy on Wednesday to open their account in UEFA Champions League Group H, though they remain three points off leaders Ajax.
Tammy Abraham scored the first goal of Chelsea's European campaign with a tidy finish at close range, only for Victor Osimhen to head level from a corner 10 minutes later.
Callum Hudson-Odoi came off the bench and crossed in for Willian to rasp in a volleyed winner with 12 minutes left in normal time, sealing a valuable three points on foreign soil.
Frank Lampard's side have now won their last three games in all competitions and are off the mark in Group H.