Hundreds of Muslim women were listed for "auction" on the mobile application with photographs sourced without permission and doctored.
Gaetan Laborde put Rennes ahead on the stroke of halftime after PSG star Lionel Messi had hit the crossbar with a free kick in the 31st minute.
Roma are Italy's representatives and Jose Mourinho's side came from behind to thump CSKA Sofia 5-1.
Camavinga, who is 18 and has been capped three times by France, has signed a six-year deal at the Santiago Bernabeu.
PSG had center half Presnel Kimpembe recklessly sent off near the end, and could have lost for the ninth time in the league this season.