Riot police officers take position in a cloud of gas, during clashes with Paris Saint Germain supporters, after the celebration of PSG’s French League title, in Paris, Monday, May 13, 2013. Paris Saint-Germain clinched its first French league title since 1994 by defeating Lyon 1-0 on Sunday. PSG has now an unassailable seven-point lead at the top of the standings. With just two rounds left, second-place Marseille can no longer catch its fierce rival. (AP Photo/Thibault Camus)