Malta champions Hibernians have been drawn against Estonian team FCI Tallinn in the first qualifying round of the Champions League.
If they qualify, Hibs will play against Austrian champion Salzburg.
Salzburg's presence in the draw threatens the place of Leipzig because both have ownership links with energy drink Red Bull. UEFA should decide this month if the clubs breach integrity rules designed to prevent two clubs that share an owner from playing in the same competition.
Salzburg has priority because it is a national champion. Leipzig was runner-up to Bundesliga champion Bayern Munich.
Also in the second qualifying round, Celtic will play either Linfield or La Fiorita.
Matches will be played between July 11 and 19.
Trepca will make Kosovo's Champions League debut in the first qualifying round, from June 27 to July 5, against Vikingur.
In the Europa League, Floriana have been drawn to play against Red Star Belgrade, Valletta against Folgore of San Marino and Balzan against Viedoton of Hungary.
Champions League First qualifying round draw:
Champions League Second qualifying round draw: