Celtic have been drawn at home to Icelandic champions KR Reykjavik in the first qualifying round for the Champions League.
Should the Hoops progress from that tie they will then play the winners of the match between Ferencváros of Hungary and Swedish side Djurgården on August 25 or 26.
Celtic played Reykjavik in qualifying for the tournament in the 2014-15 season and won 5-0 on aggregate.
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The first round of qualifying for the Champions League will be played on a single-leg basis to ensure the qualification process is completed in time for the group stages of the 2020-21 competition.
Celtic Park will likely host the game on August 18 or 19, but there is still a possibility the fixture could be staged at a neutral venue.
The Reykjavik match will be the first of four qualifying rounds Neil Lennon's side will have to progress through to make it to the group stages.
Welsh side Connah's Quay Nomads will play FK Sarajevo, while Northern Ireland champions Linfield face an away trip to Legia Warsaw if they beat Kosovan side Drita on Tuesday.
Dundalk were drawn to play Slovenian side Celje away from home, but that tie will have to take place on a neutral ground as Slovenia is not on the Irish government's green list.
Confirmed Scottish Premiership games live on Sky Sports
Sun Aug 9: Kilmarnock vs Celtic - 4.30pm
Tue Aug 11: Dundee Utd vs Hibernian - 6pm
Wed Aug 12: St Mirren vs Celtic - 6pm
Sat Aug 15: Hibernian vs Motherwell - 5.30pm
Sun Aug 16: Livingston vs Rangers - 4.30pm