Deportivo Coruna bounced back into Champions League contention with a 3-0 win over AEK Athens in Group C.
Deportivo celebrate their opener
Hector, Juan Carlos Valeron and Albert Luque supplied the goals for Deportivo, who capitulated to a record-breaking 8-3 loss in their last outing against Monaco.
"We did what we needed to do and won. After we scored our goals the match got a bit cold," said Hector.
Monaco suffered disapointment, conceding a late equaliser to PSV Eindhoven that cost them and Deportivo automatic qualification for the knock-out stages.
On-loan Real Madrid star Fernando Morientes headed the hosts into the lead just after the half hour before Dutch forward Jan Vennegoor levelled five minutes from time in a match which saw three players sent off.
Superior goal difference makes Monaco favourites to advance, but Deportivo now need a draw against PSV in their last group game.
A late goal by substitute Winston Parks gave Lokomotiv Moscow a 3-2 win over Dynamo Kiev to throw Arsenal's Group B wide open.
Maxim Buznikin had opened the scoring for Lokomotiv with a low drive in the 28th minute before Dynamo captain Valentin Belkevich equalised nine minutes later.
Sergei Ignashevich put Lokomotiv back in front from the penalty spot on the stroke of half-time, but Maxim Shatskikh equalised again midway through the second half.
Arsenal, meanwhile, earned a superb 5-1 win at the San Siro against Inter Milan.
Inter had beaten the Gunners at Highbury, but two goals by Thierry Henry and strikes by Freddie Ljungberg, Robert Pires and Edu wrapped up an unlikely rout.
Celtic, the other British side in action on Tuesday went to the top of Group A with a 0-0 draw against bottom team Bayern Munich.
They leapfrog French side Lyon, who crashed 1-0 at Anderlecht.
Finnish defender Hannu Tihinen headed the only goal to keep the Belgian outfit in contention to qualify for the next round.
Olympiakos Piraeus and Real Sociedad drew 2-2 in the only match played in Group D.
Igor Gabilondo gave Sociedad an away lead before goals from Ieroklis Stoltidis and Neri Castillo put the hosts in control.
But Gabriel Schurrer secured a point for the Spanish side, despite the 66th-minute sending-off of Darko Kovacevic.
Galatasaray and Juventus have been forced to re-schedule their tie for next Tuesday at a neutral venue, following the recent spate of bombings in Turkey.