After a thrilling 3-3 draw in Portugal on Tuesday, Benfica advanced past Monaco 4-3 overall, and PSG crushed French compatriots Brest 7-0 in the second leg after winning the first leg 3-0.
The top eight clubs advanced directly to the round of 16 under the new league phase format, avoiding a two-leg elimination play-off match.
Despite losing their last match to PSV Eindhoven, Arne Slot's team easily advanced through the league stage to take the top spot.
Liverpool are not the competitions top scorers or the best defensive side, yet their sheer consistency and versatility has made them the tournament's favourites according to various sources.
Either March 4 or March 5 will see the first leg of those ties, with the follow-up matches taking place a week later.