Paris St Germain beat Borussia Dortmund 2-0 in their opening Champions League game, with goals from Kylian Mbappe and Achraf Hakimi.
PSG leads Group F with three points, ahead of AC Milan and Newcastle United who drew earlier.
Mbappe scored a penalty four minutes into the second half, his 11th goal in his last nine Champions League appearances.
Hakimi's goal, a delicate chip, came in the 58th minute following a crisp passing move set up by Vitinha.
Despite little brilliance, PSG dominated the midfield and controlled the final 30 minutes to end with a clean sheet.