Paris Saint-Germain, which is still chasing a domestic treble in France, would go out on its own at the top of Ligue 1 with a win or draw against relegation-threatened Metz at the Parc des Princeson Tuesday. The French champ, which thrashed Lille 6-1 on Saturday, is currently second, level on points with first-place Lyon, which has a superior goal differential. PSG and Metz are the only Ligue1 teams playing on Tuesday, each fulfilling a game-in-hand over the rest of the league. PSG coach Laurent Blanc will again be missing Zlatan Ibrahimovic due to the third game of theSwede’s three-game suspension.