Ireland striker Cillian Sheridan was on target as APOEL Nicosia defeated HJK 2-0 to secure a 4-2 aggregate win in Cyprus.
The former Celtic front-man hit the opening goal in the 17th minute to give APOEL the lead and push them ahead in the tie, which was evenly poised following a 2-2 draw in the first leg.
Argentine Tomás De Vincenti proved the main man for the Cyprus champions and set up the Cavan man, whose well-struck left-footed effort flew past the keeper into the bottom right corner of the net.
De Vincenti was later rewarded with a goal from the penalty spot two minutes before the break, which settled the tie. Sheridan was also involved in the build up to the penalty after heading the ball down to his team-mate, who was then taken down in the box.
Sheridan played 81 minutes of the tie before being substituted in the closing stages.
Meanwhile, Zenit St Petersburg overturned a one-goal deficit to come through 3-1 on aggregate against AEL Limassol in their UEFA Champions League third round qualifying clash.
After trailing 1-0 after the opening tie, Russian side Zenit claimed a 3-0 win at Stadion Petrovskij thanks to goals by Jose Salomon Rondon, Danny and Alexander Kerzhakov.
Anders Jacobson scored twice as Danish side Aalborg came through 2-0 to defeat Dinamo Zagreb 2-1 on aggregate, while Martin Hinteregger's double saw Salzburg claim a 2-0 second leg victory as his side progressed 3-2 overall winners against Azerbaijan side Qarabag Agdam.
Elsewhere, Slovan Bratislava progressed despite a goalless draw against Sheriff thanks to their 2-1 win in the opening clash, Malmo progressed on away goals against Sparta Prague and Besiktas took a 5-2 aggregate win over Feyenoord thanks to a 3-1 win.
Steaua Bucharest and FC Copenhagen also progressed, as did Ludogorets on away goals thanks to Marcelinho's double after they drew 2-2 against Partizan Belgrade following a goalless opening encounter.
Celtic's hopes of another European campaign were ended as they were beaten 2-0 by Legia Warsaw, meaning they lost 6-1 on aggregate.
Michal Zyro and Michal Kucharczyk scored for the Polish side to wrap up a comprehensive victory over two legs.