Aberdeen draw with Groningen
Dutch side FC Groningen have the advantage after holding Aberdeen to a goalless draw at Pittodrie in their second qualifying round first-leg.
Striker Niall McGinn and midfielder Peter Pawlett, who recovered from a knock to make the starting line-up, had the Scottish Premier League side's best chances, both thwarted by goalkeeper Sergio Padt.
Winger Jonny Hayes also recovered from an injury picked up in the first qualifying round win over Daugava Riga and was influential, while Groningen were limited to speculative efforts from distance.
Groningen, who finished seventh in last season's Eredivise, named two new signings in their starting line-up, with former Ajax striker Danny Hoesen and goalkeeper Padt making their debuts.
Tempers flared in the second-half as both sides grew increasingly frustrated by their own inability to score but the away side threatened most as the game wore on, with midfielder Rasmus Lindgren shouting just wide after the hour.
Recent Aberdeen signing David Goodwillie came on as a second-half substitute but the striker was unable to get off the mark since joining from Blackburn in front of 16,523 at Pittodrie.
Aberdeen travel to Holland for the second leg with Gronigen next Thursday.