Aston Villa have to simply hold strong to make it to the UEFA Europa League quarter-finals after defeating Lille one-nil on the road.
Match Replays
Bologna and Roma are level following a one-one draw in the opening leg in Emilia, as the guests managed to respond after going down in the score.
Porto and Stuttgart meet in a heated second leg of the Round of 16, with the hosts having built a 2-1 advantage in the first leg in Germany.
Real Betis return home to the Estadio La Cartuja de Sevilla, necessitating a win, since Panathinaikos came out on top with a one-nil result in Greece.
Midtjylland just have to hold on to their lead at home to pull off an upset, having defeated Nottingham Forest one-nil in London in the first leg.
Freiburg seek a big day at the Europa-Park Stadion to advance to the next round, since Genk narrowly prevailed in the opening bout in Belgium.
Lyon look to exploit an away draw in the first leg of their Round of 16 matchup to secure a spot in the next phase while tangling with Celta at home.
Braga need a strong performance in front of their crowd as they try to stage a comeback from a two-goal deficit against Ferencváros.
Freiburg head across the Eastern border for their opening Round of 16 meeting in UEFA Europa League play, facing Genk at the Cegeka Arena.
Lyon and Celta meet in a battle between Ligue 1 and La Liga, with first-place Lyon looking to avoid a misstep as they make the trip to Galicia.
Ferencváros are riding high following a successful comeback in the playoff round versus Ludogorets as they prepare to lock horns with Sporting Braga.
Midtjylland hope not to let their strong displays unravel in the knockouts, as they start battling Nottingham Forest, which just eliminated Fenerbahce.