Real Madrid have been drawn in group H with Borussia Dortmund in their quest to win the competition for three consecutive periods, while Barcelona have been paired in the same group with Juventus in a rematch of the 2016-17 semis.
Heres the full list of groups in this seasons UEFA Champions League.
Group A
Benfica
Manchester United
Basel
CSKA Moskva
Group B
Bayern Munich
Paris Saint Germain
Anderlecht
Celtic
Group C
Chelsea
Atletico
Roma
Qarabag
Group D
Juventus
Barcelona
Olympiacos
Sporting CP
Group E
Spartak Moskva
Sevilla
Liverpool
Maribor
Group F
Shakhtar Donetsk
Manchester City
Napoli
Feyenoord
Feyenoord
Group G
Monaco
Porto
Besiktas
RB Leipzig
Group H
Real Madrid
Borussia Dortmund
Tottenham Hotspur
APOEL