Barcelona suffered their first defeat of the season as Paris St-Germain moved top of Group F with a thrilling Champions League victory.
The visitors, who had not conceded all season before arriving at Parc des Princes, fell behind when former Chelsea defender David Luiz scored.
Lionel Messi grabbed an equaliser but Marco Verratti nodded in PSG's second.
Blaise Matuidi poked in a third and although Neymar reduced the deficit, Barcelona could not find an equaliser.
They pressed in the closing stages but found the PSG defence, led by the impressive Luiz, hard to break down.
Barcelona substitute Xavi Hernandez made Champions League history by coming on for his 143rd appearance in the competition - more than any other player.
Victory for the PSG, meanwhile, continued their unbeaten start to the season and means they are now top of their group with four points, one more than Barcelona.
