Ousmane Dembele's second-half brace and goals from Khvicha Kvaratskhelia and Vitinha led Paris St Germain to a 4-1 home win over AS Monaco on Friday to maintain their unbeaten run and extend their lead at the top of Ligue 1.

PSG, who announced contract extensions for coach Luis Enrique, Achraf Hakimi, Nuno Mendes and Vitinha before the game, recorded their 16th win in 21 games to move to 53 points, 13 ahead of second-placed Marseille, who have a game in hand.

Vitinha opened the scoring after just six minutes, beating the Monaco goalkeeper with a low free-kick inside the near post, before Denis Zakaria equalised for the visitors in the 17th minute from a tight angle following a fine through ball from Soungoutou Magassa.

Both sides had chances to take the lead before half-time, but it was PSG's new signing Kvaratskhelia who put the hosts back in front with his first goal for the club after a brilliant run inside the penalty area.

Ligue 1's top scorer Dembele doubled the advantage three minutes later after playing a one-two with Desire Doue, and the 27-year-old winger sealed the win with his 16th league goal of the season in stoppage time.

The French champions next face fellow Ligue 1 side Brest in the Champions League knockout play-offs on Tuesday.