Substitute Kevin Gameiro scored the only goal as Paris Saint-Germain beat Montpellier 1-0 on Friday to open an eight-point lead in Ligue 1.
Gameiro's 80th-minute strike arrived just nine minutes after the 25-year-old had replaced Clement Chantome as PSG secured a morale-boosting win just four days before they tackle Barcelona in the Champions League quarter-finals.
David Beckham, who had come on as a substitute at the same time as Gameiro, played a key role in the goal.
The former England captain, showing no signs of fatigue after his four-day publicity trip to China, started the move which yielded all three points.
His pass found Jeremy Menez, who in turn released Zlatan Ibrahimovic and the Swede's pass was collected by Gameiro to score and sink the defending champions at the Parc des Princes.