Paris: Paul Le Guen picked up his first win as Paris St Germain coach on Saturday as his side beat visitors AS Monaco 4-2 in the French Ligue-1. PSG's battle against relegation received an early boost in the game at the Parc des Princes. Jerome Rothen's measured right wing cross found Amara Diane, who headed PSG into a fifth minute lead. Diane was in the thick of the action again in the 35th minute when he ran on to Marcelo Gallardo's clever chip over the Monaco defence. The resulting shot bounced against the legs of Monaco goalkeeper Flavio Roma and rolled over the goal-line to put PSG 2-0 ahead. Visitors Monaco pulled a goal back five minutes into the second half when Camel Meriem's corner kick found its way to Frederic Piquionne. Piquionne smashed a shot into the back of the net from ten yards out. Le Guen's side conceded a penalty in the 77th minute, but Piquionne's spot kick was saved and Monaco were soon punished as Gallardo's powerful 82nd minute free kick found the back of the net to make it 3-1. PSG grabbed a fourth goal three minutes later when terrible defending from Fabian Bolivar allowed Cristian Rodriguez to loop the ball into the back of the net. Monaco replied almost immediately and their second goal came too quickly for the television director - substitute striker Jan Koller finding the target with the help of a deflection. The home side held on to win 4-2 though, handing Le Guen his first win as PSG coach and a valuable three points.