Watch full highlights from Arsenal and Manchester City.
Alexis Sánchez scores to give Arsenal the lead in extra time
Sergio Agüero chases down a through ball and finishes.
Nacho Monreal volleys in the equalizer for Arsenal.
Kylian Mbappe can't stop scoring for Monaco
Second leg highlights between Monaco and Manchester City.
Leroy Sane gives Manchester City the lead on aggregate.
Bakayoko's strong header puts Monaco ahead on away goals.
Kylian Mbappe scores the opening goal in the second leg.
Fabinho scores to put Monaco ahead on away goals.