Dynamo Kiev took a huge step towards the group stages of the Champions League with a 3-1 away victory over Borussia Monchengladbach in the first leg of their qualifying play-off.
Monchengladbach, in their first match in Europe's top club competition since 1978, took a 13th-minute lead through Alexander Ring's low finish inside the near post but their chances of progressing now look slim following an impressive fightback from Dynamo.
The Ukrainian side, who beat Feyenoord in the previous round, drew level in the 28th minute through captain Taras Mikhalik's deflected long-range shot and then went ahead eight minutes later when Andriy Yarmolenko found the back of the net following a quick break.
An own goal from Luuk de Jong nine minutes from time handed Dynamo a third to leave them as overwhelming favourites to go through.
Celtic are in a similarly strong position against Helsingborg after earning a hard-fought 2-0 win from their first leg trip to Sweden.
Kris Commons gave the Scottish champions a flying start with a goal after just two minutes, smashing home an acrobatic far-post volley, and then, after Celtic goalkeeper Fraser Forster has helped keep his side in front with an impressive display, Georgios Samaras headed a second in the 75th minute.
A second-half brace from Moudou Sougou helped CFR Cluj overturn a half-time deficit to beat Basel 2-1 in Switzerland.
Marco Streller's 44th-minute strike put the hosts ahead but Sougou goals in the 65th and 70th minutes left the visitors holding the upper hand heading back to Romania.
Spartak Moscow earned a 2-1 lead over Fenerbahce to take to Turkey for next week's second leg thanks to a fine match-winning strike from Dmitri Kombarov.
All three goals came in a 10-minute spell during the second half, with Spartak taking a 59th-minute lead through Emmanuel Emenike, Fenerbache drawing level through Dirk Kuyt six minutes later before Kombarov's superb left-footed volley from a corner earned the Russian side the victory.
In Tuesday's other match, FC Copenhagen beat Lille 1-0 following a 38th-minute goal from Cesar Santin.