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PSG come into Round 21 at the top of the table, but they are only three points clear of second-placed Lens after a run of just one win and two defeats in their last four league games.

"It's not enough in terms of points and play. We must quickly find a higher level of play than what we are offering," said Galtier, whose side were held 1-1 at home to Reims on Sunday. "We have to rediscover our discipline, high standards, individual and collective efforts. We saw this very often during the first few months. 

WATCH: PSG are held by Reims

"We talked about it a lot during the pre-season and at the start of the season. We are finding it difficult to find that in January, we spoke about it this morning with the players and we are working in this direction. There must be an awareness of the players on what they give on the pitch."

Neymar has a muscle problem that will keep him out of the game against Montpellier, against whom Mbappé has scored nine times in his last 11 appearances, including PSG's 5-2 victory against the southerners in the second game of the season.

That is one of nine losses Montpellier have suffered in their last 10 Ligue 1 Uber Eats meetings with the Parisians, conceding an average of nearly four goals per 90 minutes each time, but Galtier is taking nothing for granted.

"Matches at La Mosson are always difficult, there will be a lot of excitement tomorrow. They responded against Auxerre, there is no easy match. The main thing to do in this match is to concentrate on our game and the intensity we will put into the game. We let points slip against Reims, we have to get them back in Montpellier," said Galtier.

"We realise that in the French league, anyone can beat anyone. There is quality in the squads, on the bench, people work hard. It's very tight in the table, the teams are fighting for survival and for the race for Europe. Ligue 1 has raised its level of play, there are more goals, there are more games, it's a very attractive league."

WATCH: Montpellier get a welcome win at Auxerre

Montpellier ended a three-game losing streak thanks to a Stephy Mavididi brace that gave them a 2-0 victory at Auxerre on Sunday that leaves them five points above the bottom four. Next Sunday's trip to Strasbourg - the team currently in 17th place - will be crucial to Montpellier's hopes of top-flight survival, but coach Romain Pitau is looking for his side to keep morale high with a quality performance against the champions.

"The best way to prepare for Strasbourg will be to play well against Paris," said Pitau, who picked up only his second win in nine matches in charge last weekend. "We showed unity against Auxerre, it worked out for us. The team showed character. We're on the right track and we know where we want to go. When we go out onto the pitch, it's be as good as possible and not have any regrets at the end of the match. We'll go out there and see what we can do."

Probable teams

Montpellier: Lecomte - Jullien, Maouassa, Sacko, Kouyaté, Estève - Savanier (c), Ferri, Leroy - Germain, Mavididi

PSG: Donnarumma - Marquinhos (c), Hakimi, Mendes - Pereira, Ruiz, Sanches, Vitinha - Messi, Mbappé, Ekitike

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