APOEL 1-2 Qarabag
Qarabag put themselves in a good position to qualify for play-offs after recording a 2-1 win away to APOEL at the Neo GSP.
After a scoreless opening half, Mahir Emreli and Magye Gueye put the visitors 2-0 up before Giogios Merkis pulled one back for APOEL in second-half stoppage time.
PAOK 2-2 Ajax Amsterdam
Ajax Amsterdam will have a slight advantage heading into the second leg after drawing 2-2 away to PAOK on Tuesday night.
Hakim Ziyech and Klaas Jan Huntelaar got the away goals for the Dutch champions while Chuba Akpom and Leo Matos netted for the Greek outfit.
Dinamo Zagreb 1-1 Ferencaros
Ferencaros managed to get a vital away goal after drawing 1-1 with Dinamo Zagrab at the Stadion Maksimir on Tuesday night.
Daniel Olmo got the hosts off to a fine start after finding the back of the net on seven minutes, but Ferencaros secured the equaliser thanks to David Siger's 59th minute strike.
Crvena Zvezda 1-1 FC Copenhagen
In Tuesday's final encounter, late penalty from Jonas Older cancelled out Milan Pavkov first-half strike as FC Copenhagen secured a 1-1 draw away to Crvena Zvezda.