Greek champions Olympiacos were drawn in Group D and will face Italian giants Juventus, Spanish Barcelona and Portuguese side Sporting Lisbon.
Barcelona will have the chance to get revenge for last season’s Champions league defeat to Juventus as the pair were drawn together in the group phase on Thursday.
The Catalans will take on Juve in Group D of the competition, having lost at the quarter-final stage in 2016-17.
Greek champions Olympiacos and Sporting Lisbon will hit each other for third place that leads to Europa League, after the draw was held in Monaco.
Program of Olympiacos
Olympiacos – Sporting Lisbon
Juventus – Olympiacos
Barcelona – Olympiacos
Olympiacos – Barcelona
Sporting Lisbon – Olympiacos
Olympiacos – Juventus/IBNA