How did they get here?published at 17:19 Greenwich Mean Time 7 March 2019
Rennes v Arsenal (17:55 GMT)
Arsenal had to overturn a disappointing 1-0 first-leg deficit in the round of 32, but did so comfortably with a 3-0 home victory over Belarus side Bate Borisov.
Opponents Rennes defeated La Liga side Real Betis 3-1 in Spain to secure their place in the last 16, following an entertaining 3-3 draw at home.
Rennes haven't played for eight days and have lost just three times in 15 games this calendar year.