For a little more than ten minutes, Chelsea seemed in trouble at the Stade Pierre-Mauroy. Burak Yilmaz had converted from the penalty spot and Lille's supporters were raucous.
It was a test of the Blues' nerve. Another tricky situation for Thomas Tuchel and his players to overcome. Fortunately, they did so and in a rather impressive fashion. Moments before half-time, Jorginho poked a delightful pass through the Lille defence for Christian Pulisic. The American, from an acute angle, did the rest.
That restored Chelsea's two-goal advantage on aggregate but Lille threatened still. It wasn't until the second period and Cesar Azpilicueta's kneed-finish from a Mason Mount cross that the Blues booked their place in the Champions League quarter-finals.