Paris Saint-Germain began their Champions League campaign with a 2-0 win over Borussia Dortmund.
The first half ended goalless at the Parc des Princes, as both sides failed to create any meaningful chances.
But Kylian Mbappe gave PSG the lead from the spot, before Achraf Hakimi sealed the win with a fantastic solo effort.
Manchester City came from behind to defeat Red Star Belgrade 3-1 at the Etihad.
Bukari opened scoring, but Julian Alvarez struck twice, before Rodri added a third.
Barcelona hammered Royal Antwerp 5-0, while Newcastle United played out a 0-0 draw at AC Milan.