Mauricio Pochettino has not given up on winning Ligue 1, but conceded Paris Saint-Germain got no less than they deserved against Rennes as their title hopes took a hit following a 1-1 draw.

Neymar celebrated his new four-year deal with PSG by scoring a contentious penalty to put Pochettino's team ahead on Sunday, only for Serhou Guirassy's fine header to seal a point for Rennes.

PSG were in fact lucky not to lose, with Presnel Kimpembe seeing red late on and Keylor Navas pulling out some impressive saves to keep it at 1-1.

The draw leaves PSG three points behind Lille with two games remaining – no team has ever been crowned Ligue 1 champions with such a gap at this stage – and the title may well be wrapped up next week should the capital club drop points against Reims and the leaders beat Saint-Etienne.

Indeed, it is not just the title PSG have to worry about, with their place in the Champions League no certainty.

PSG edged possession (57.8 per cent) against Rennes, but their tally of 12 attempts was seven fewer than the hosts managed, while only four of them were on target – Bruno Genesio's European hopefuls, who were without key midfielders Steven Nzonzi and Eduardo Camavinga, managing 10 in total.

"A lot can still happen, we are disappointed, but we have to give credit to Rennes, who had a very good game," PSG head coach Pochettino in his post-match news conference.

"We have to win the next matches to hope for something. We were not better than Rennes over 90 minutes, we did not deserve to take three points.

"It's a season with a lot of ups and downs, we arrived four months ago to help the club. A club like PSG must always think in the future. Every club thinks of improving, decisions will be made at the end of the season, we always think of improving."

While Neymar toiled, he was not helped by the absence of Kylian Mbappe, who was suspended – albeit he has been struggling with an injury which kept him from featuring against Manchester City in the Champions League midweek as PSG lost in the semi-finals.

Asked if Mbappe's absence was a major factor in the poor performance, Pochettino replied: "We must not think that we did not win because of an absence."

PSG have now failed to keep a clean sheet in their last eight Ligue 1 fixtures, conceding 11 goals in total, making it their longest such run since a streak of 11 top-flight matches back in 2012.

The frustration boiled over heading towards the dying embers, with France centre-back Kimpembe lunging in on Jeremy Doku and receiving a straight red.

"We see frustration with the result, he arrives late. We are professionals, we know our responsibilities, our obligations," Pochettino said.

PSG captain Marquinhos, however, did not hold back.

"We will play what we have left to play. We have a Coupe de France to go for and the championship to continue to put pressure on Lille," he told Canal+.

"We have to go 100 per cent. It is unacceptable to leave points like that when we are Paris Saint-Germain. It can happen once, twice, but it's starting to happen a lot. We have to be sincere, it's not our best season, we weren't very strong. We have to do a lot better at the end of the season."

Paris Saint-Germain moved back to the top of Ligue 1 thanks to a battling 2-1 win over Lens at Parc des Princes on Saturday.

Neymar scored the opener and crossed for Marquinhos to head in the champions' second as they responded well to their 2-1 home loss to Manchester City in the Champions League this week.

With Kylian Mbappe missing through injury and Marco Verratti, Angel Di Maria and Ander Herrera starting on the bench, PSG were made to work hard for a result that lifted them back above Lille at the summit, at the very least for a few hours.

Ignatius Ganago pulled a goal back for European hopefuls Lens, but Mauricio Pochettino's men held firm for a morale-boosting win ahead of their second-leg clash with City in England next Tuesday.

PSG, who lost right-back Colin Dagba to injury before the 20-minute mark, had few early chances despite their dominance, although Danilo Pereira tested Wuilker Farinez with a powerful header that was well saved by the Lens keeper.

Lens had done well to keep Neymar quiet but gifted him the opener 32 minutes in, the Brazil star slotting home confidently after Julian Draxler had pinched possession from Facundo Medina on the edge of the box.

Pablo Sarabia should have scored a second after Neymar's header from a fine Marquinhos pass, but Farinez produced a superb one-handed stop, and Lens could have snatched an equaliser before half-time had Jonathan Clauss and Clement Michelin shown more composure inside the box.

Lens began the second half well but PSG doubled their lead just before the hour mark, Marquinhos rising unchallenged to head in Neymar's corner from the right.

However, the visitors halved the deficit barely two minutes later, Ganago hooking the ball through Navas' legs after Arnaud Kalimuendo sliced an attempted overhead kick.

Neymar curled a free-kick off the right post, seemingly via the fingertips of Farinez, and Mauro Icardi saw a goal disallowed for a Marco Verratti offside, but Lens could not capitalise on those moments of fortune.

Mauricio Pochettino was delighted with the spirit his Paris Saint-Germain team showed to defeat Lille in the Coupe de France after a difficult few days.

PSG were 3-0 winners against the Ligue 1 leaders as they were in action for the first time since a weekend defeat to Nantes that was disrupted by burglaries at the family homes of Angel Di Maria and Marquinhos.

Di Maria was substituted in that loss to attend to the matter, but both players were in the XI as goals from Mauro Icardi and Kylian Mbappe secured a quarter-final berth on Wednesday.

It was not an entirely convincing PSG display, as Lille had 18 shots to their 11 and Keylor Navas was required to save a penalty for the third time this season.

Pochettino was only interested in praise for his players and their families, however.

"Of course I'm so happy with the performance and the spirit of the team," the coach told the club's official channel.

"They deserve massive credit and I want to congratulate them but most of all the families because the last few days were very tough for everyone.

"We all feel what happened to Marqui and Angel. It really touched the group and that's why I want to congratulate the team, the players and the families suffering around them.

"I'm so happy. I think we fully deserved to go through to the quarter-finals and, in this difficult circumstance, I'm happy for the 3-0."

Di Maria had two shots and created a single chance, while Marquinhos contributed four tackles, five clearances and a block.

Navas was the star of the show, though, denying Yusuf Yazici from 12 yards with 12 minutes remaining.

Only Rui Silva and Oliver Baumann (both four) have kept out more penalties than Navas in all competitions this season among goalkeepers across Europe's 'top five' leagues.

"He is one of the best goalkeepers in the world," Pochettino said of Navas, who finished with five saves in all. "His level is incredible."