Arsenal were handed a tough draw in the Champions League group stages as they were paired with Bayern Munich.
PSG left-back Lucas Digne has joined Roma on a season-long loan deal.
Blaise Matuidi scored his second goal of the season to secure Paris St Germain a 1-0 win at bottom side Montpellier.
Ligue 1 champions Paris Saint-Germain struck twice early on to see off promoted Gazelec Ajaccio 2-0 on Sunday evening.
Paris St Germain won in front of Angel Di Maria, while Marseille slumped to their second defeat of the Ligue 1 season
PSG got their Ligue 1 title defence off to a winning start, earning a 1-0 victory over Lille after playing for more than an hour with 10 men.