Second leg matches are scheduled for August 24/25 but Galatasaray, the UEFA Cup winners, are due to play European champions Real Madrid in the UEFA Super Cup in Monaco on August 25.
UEFA have given the Turkish champions the option of playing on August 22 or, if their opponents agree, a week earlier on August 15/16.
The first leg matches are due to be played on August 10/11.
The draw for the third qualifying round, which takes place at UEFA's headquarters on Friday, will feature 32 teams, 14 having progressed from the second qualifying round and 18 from Europe's strongest national leagues.
Reuters
