THIS IS WHAT U.E.F.A RULES SAY OF THESAME OWNER HAVING TWO CLUBS.

 Now according to U.E.F.A rules since 1998 states that no party partially or fully owning a club in Europe can buy or have a  stake in another club..

 Now the Qatari Financial company want to buy  Manchester United..

 So both P.S.G and Manchester United  may play  in the same champion league tat year ,here  only one club can be allowed to play, so the owners will have to choose the club to play.