Paris St-Germain became the first French side to complete a domestic treble thanks to Edinson Cavani’s headed winner against a dogged Auxerre in the French Cup final. The Uruguay striker settled the outcome midway through the second half when his effort struck the bar, then the back of goalkeeper Donovan Leon. “We won the rest of the trophies,” said PSG’s top scorer Zlatan Ibrahimovic. “No other team has done this and I’m very proud of the team.” PSG coach Laurent Blanc added: “We finished the season very well. We wanted this cup and it was hard to win it. “Auxerre played very well and you have to take your hat off to them. They played to their strengths.” The Ligue 1 and French league cup champions also went close through Thiago Motta, who hit a post with a 25-yard drive, while Cavani had a header saved and a shot blocked near the goal line.