Ousmane Dembl came off the bench to score twice and help a shaky Paris Saint-Germain win 4-1 at Rennes to stay unbeaten in Ligue 1. Bradley Barcola got one goal and set up another as PSG moved 16 points ahead of second-placed Marseille, which conceded a stoppage-time goal in a 1-0 home defeat to Lens in the late game on Saturday. Third-placed Nice can move level on points with Marseille if it beats Lyon at home on Sunday. PSG coach Luis Enrique rested captain Marquinhos ahead of the return leg at Liverpool in the last 16 of the Champions League next Tuesday. PSG lost the first leg 1-0 despite dominating. Dembl was joined on the bench by right back Achraf Hakimi, winger Khvicha Kvaratskhelia and goalkeeper Gianluigi Donnarumma. PSG controlled the first half but made many mistakes after the break as Rennes attacked strongly, before Dembl wrapped up the win late on. Barcola put PSG ahead in the 28th minute when he placed the ball through goalkeeper Brice Samba's legs. Ludovic Blas a