Arsenal was drawn to play Fenerbahce in the Champions League playoffs as it seeks a 16th straight season in the lucrative group stage.
Seven-time winner AC Milan was paired in Friday’s draw with PSV Eindhoven, the 1988 European champion, with the first match in the Netherlands.
Schalke was drawn to play Metalist Kharkiv, which faces a match-fixing disciplinary hearing at UEFA on Tuesday.
Among the 10 pairings it was: Lyon vs. Real Sociedad, Pacos de Ferreira vs. Zenit St. Petersburg and newcomer Shakhter Karagandy hosting Celtic. The Scottish champion faces a long trek to Kazakhstan for the first match.
First legs are to be played on August 20 or 21 and return matches on August 27 or 28.
Winners advance to the elite 32-team group stage, which will be drawn on August 29 in Monaco.
The Court of Arbitration for Sport has set an August 28 deadline to rule on Fenerbahce’s appeal against a two-year ban from UEFA competitions. No hearing date has been set.
UEFA’s Champions League rules require clubs not to have been involved in fixing matches since April 2007, and several Fenerbahce officials were convicted in a criminal trial of fixing matches during the club’s 2011 national title run. They deny wrongdoing.
Metalist also faces UEFA sanctions after CAS last month dismissed an appeal by the Ukrainian club’s sports director against a five-year ban from football. The Ukrainian football federation had judged that Metalist’s 4-0 win against Karpaty Lviv in an April 2008 league match was fixed.