Real Madrid will face Paris Saint-Germain while defending champions Liverpool have been paired with Napoli, Salzburg and Genk in the Champions League group stage this season.
Madrid eliminated the Parisians in the round of 16 in the 2017-18 edition of the competition and have been linked to PSG's biggest stars -- Neymar and Kylian Mbappe -- in recent years.
Madrid and PSG are joined in Group A by Club Brugge and Galatasaray. The previous two times Los Blancos were placed in the group -- in 2002 and 2016 -- they won the competition.
Liverpool, who were drawn in Group E, will begin their title defence against Napoli, Salzburg and Genk.