Freiburg head across the Eastern border for their opening Round of 16 meeting in UEFA Europa League play, facing Genk at the Cegeka Arena.
Match Replays
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.
Aston Villa need to recover quickly from a poor finish in league play while visiting Lille in the first match of the UEFA Europa League Round of 16.
Familiar foes meet in the Round of 16, with Roma defying Bologna in the first leg of a matchup for Italian superiority in UEFA Europa League action.
Porto start their bid to add a third UEFA Europa League trophy to their cabinet as they begin knockout phase action against Stuttgart at the MHPArena.
Panathinaikos survived the playoff round via a penalty shootout, and things won't get any easier as they gear up to square off against Real Betis.
Dinamo Zagreb have dropped four of their past five matches in the competition and have their backs against the wall after losing 3-1 to Genk at home.
Nottingham Forest only need to avoid a major collapse to eliminate Fenerbahçe, heading back to the City Ground with a 3-1 lead in their pocket.
Celta have the security of playing at home as they look to finish the job in the second leg of their UEFA Europa League play-off versus PAOK.
Bologna look to defend the narrow lead they have built in Norway last week as they take on Brann at home in the second leg of their play-off contest.