Barcelona v Roma
Sevilla v Bayern Munich
Juventus v Real Madrid
Juve and Real Madrid played in last year’s final, of course; Sevilla and Bayern have never met, while Liverpool and Man City have never met in European competition.
Barcelona have played Roma in the CL four times; most recently, in the 2015-16 group stage, the teams drew 1-1 in Italy and Barca won 6-1 at the Camp Nou.
RB Leipzig v Marseille
Arsenal v CSKA Moscow
Atletico Madrid v Sporting Lisbon
Lazio v Salzburg
Arsenal avoid Atleti but haven’t fared well historically against CSKA, while Lazio have lost twice to Salzburg.
Atleti faced Sprting in the round of 16 in the 2009-10 Europa League, and progressed on away goals (2-2, both goals from Kun Aguero).