Chelsea secured a 2-0 win over Borussia Dortmund on Tuesday night in the second leg Round of 16 contest to advance to the last eight of the Champions League.
MATCH PROCEEDINGS
The visitors were handed an early setback as attacker Julian Brandt was withdrawn due to injury with Gio Reyna coming on replace him inside the opening five minutes.
Alexander Mayer denied Chelsea forward Joao Felix after the latter was teed up by Marc Cucurella and the resulting corner saw Koulibaly heading his effort wide.
Kai Havertz could only find the side netting with the German supported by Felix in the attacking third as the on-loan Portuguese lofted a pass for his strike partner.
A fantastic one-hand save from Kepa denied Dortmund skipper Marco Reus from slotting a free kick into the top left-hand corner and preventing Dortmund from taking the lead.
Havertz hit the inside of the post but Chelsea did not have to wait for long to find the opener with Raheem Sterling on target to get his side level on aggregate.
A VAR check awarded the home side a penalty, twice taken by Havertz, with the forward making no mistake in putting the ball into the back of the net.
Substitute Conor Gallagher had the ball in the net but Sterling was adjudged to be offside in the build-up while Chelsea rang in changes off the bench.
Seven scrappy minutes of additional time was what it took for Chelsea to get past the finish line and secure an important win on home turf.