Sunderland will travel to AC Milan in the Europa League and Bournemouth will host the Serie A giants as Brighton and Hearts discovered their Conference League opponents.
The league phase draws for both competitions were made on Friday, with Europa League clubs set to play eight matches while Conference League sides will play six, an equal number home and away, between September 2026 and January 2027.
Sunderland reached Europe for the first time in 53 years and will travel to the San Siro to face AC Milan, while Bournemouth, in their first-ever European competition, will host the Italian club.
Celtic will host Marseille and travel to Marco Silva's Benfica among their eight Europa League matches, while Crystal Palace, last season's Conference League winners, will host LaLiga side Real Sociedad and visit France's Lyon.
Sunderland's Europa League fixtures
Bournemouth's Europa League fixtures
Crystal Palace's Europa League fixtures
Celtic's Europa League fixtures
Europa League fixture dates
Matchday 1: September 16/17
Matchday 2: October 15
Matchday 3: October 22
Matchday 4: November 5
Matchday 5: November 26
Matchday 6: December 10
Matchday 7: January 21, 2027
Matchday 8: January 28, 2027
Knockout stage
Knockout phase play-offs: February 18 & 25, 2027
Round of 16: March 11 & 18, 2027
Quarter-finals: April 8 & 15, 2027
Semi-finals: April 29 & May 6, 2027
Final: May 26, 2027 (Stadion Frankfurt, Germany)
Brighton's Conference League fixtures
Hearts' Conference League fixtures
Conference League fixture dates
Matchday 1: October 15
Matchday 2: October 22
Matchday 3: November 5
Matchday 4: November 26
Matchday 5: December 10
Matchday 6: December 17
Knockout stage
Knockout phase play-offs: February 18 & 25, 2027
Round of 16: March 11 & 18, 2027
Quarter-finals: April 8 & 15, 2027
Semi-finals: April 29 & May 6, 2027
Final: June 2, 2027 (Besiktas Park, Istanbul, Turkey)