Neymar joined PSG from Barcelona for a world-record £200m in 2017
Brazil forward Neymar became Paris St-Germain's fourth top-scorer of all time as the French champions held on for a narrow win at home to Brest.
The 30-year-old claimed his 110th goal to move in front of ex-Portugal striker Pauleta on PSG's list of scorers.
PSG were unable to add to their lead and then Brest won a penalty on 70 minutes - but Gianluigi Donnarumma saved Islam Slimani's tame spot-kick.
Victory sent unbeaten PSG back above Lens at the top of the Ligue 1 table.
Lens led Ligue 1 after winning 1-0 at home to Troyes on Friday, but Marseille will go level on points with PSG if they beat visitors Lille later on Saturday.
Lionel Messi chipped the ball forward for Neymar to score his eighth goal from seven Ligue 1 game this season.
The Brazil forward took a touch with his right foot before firing in with his left.
Zlatan Ibrahimovic is next on PSG's all-time scorers list with 156, while Neymar's team-mate Kylian Mbappe is second with 180.
Christophe Herelle was shown a red card for bringing down Neymar but the decision was overturned as a review showed the PSG forward was offside before the tackle.
Messi and Mbappe spurned chances either side of half-time and looked set to pay for the misses when Presnel Kimpembe committed the foul for the penalty.
However Donnarumma denied Slimani then made another diving save after a cross diverted goalwards off the Brest forward's shoulder.
- Line-upsMatch StatsLive Text
Line-upsPSG
Formation 3-4-1-2
99G Donnarumma4Ramos15Danilo3Kimpembe2Hakimi17Vitinha6Verratti14Bernat30Messi7Mbappé10Neymar
- 99G Donnarumma4Ramos15DaniloBooked at 77mins3KimpembeBooked at 69minsSubstituted forat 90+3'minutes2Hakimi17VitinhaSubstituted forMarquinhosat 87'minutes6VerrattiSubstituted forRuizat 62'minutes14BernatSubstituted forTavares Mendesat 78'minutesBooked at 80mins30Messi7MbappéSubstituted forEkitikeat 78'minutes10NeymarBooked at 40minsSubstituted forSarabiaat 77'minutes
Substitutes
- 1Navas5Marquinhos8Ruiz19Sarabia25Tavares Mendes26Mukiele28Soler33Zaïre-Emery44Ekitike
Brest
Formation 5-3-2
40Bizot99Fadiga23Hérelle5Chardonnet3Brassier2Duverne20Lees-Melou45Camara7Belkebla9Honorat13Slimani
- 40Bizot99FadigaSubstituted forUronenat 71'minutes23HérelleSubstituted forDariat 62'minutes5ChardonnetBooked at 46mins3Brassier2Duverne20Lees-MelouBooked at 25minsSubstituted forPereira Lageat 71'minutes45CamaraSubstituted forMagnettiat 62'minutes7BelkeblaSubstituted forCardonaat 88'minutes9Honorat13Slimani
Substitutes
- 1Blázquez4Dari8Magnetti14Cardona18Dembele21Uronen29Pereira Lage31Belaïli97Arconte
Referee:Jeremie PignardMatch StatsHome TeamPSGAway TeamBrestPossessionHome61%Away39%ShotsHome14Away6Shots on TargetHome4Away3CornersHome3Away5FoulsHome13Away16Live TextPost update
Match ends, Paris Saint Germain 1, Brest 0.
90'+6'Full Time
Second Half ends, Paris Saint Germain 1, Brest 0.
90'+4'Post update
Fabián Ruiz (Paris Saint Germain) wins a free kick in the attacking half.
90'+4'Post update
Foul by Hugo Magnetti (Brest).
90'+3'Post update
Presnel Kimpembe went off injured after Paris Saint Germain had used all subs.
90'+3'Post update
Hugo Ekitike (Paris Saint Germain) wins a free kick in the attacking half.
90'+3'Post update
Foul by Achraf Dari (Brest).
89'Post update
Offside, Paris Saint Germain. Lionel Messi tries a through ball, but Nuno Mendes is caught offside.
88'Substitution
Substitution, Brest. Irvin Cardona replaces Haris Belkebla.
88'Post update
Attempt missed. Marquinhos (Paris Saint Germain) header from the centre of the box misses to the left. Assisted by Pablo Sarabia with a cross following a corner.
87'Substitution
Substitution, Paris Saint Germain. Marquinhos replaces Vitinha.
86'Post update
Corner, Paris Saint Germain. Conceded by Jean-Kévin Duverne.
86'Post update
Attempt blocked. Vitinha (Paris Saint Germain) right footed shot from outside the box is blocked. Assisted by Hugo Ekitike.
85'Post update
Attempt missed. Vitinha (Paris Saint Germain) right footed shot from outside the box misses to the left. Assisted by Nuno Mendes.
82'Post update
Nuno Mendes (Paris Saint Germain) wins a free kick on the left wing.
82'Post update
Foul by Jean-Kévin Duverne (Brest).
80'Booking
Nuno Mendes (Paris Saint Germain) is shown the yellow card for a bad foul.
80'Post update
Foul by Nuno Mendes (Paris Saint Germain).
80'Post update
Franck Honorat (Brest) wins a free kick on the right wing.
78'Post update
Corner, Brest. Conceded by Gianluigi Donnarumma.
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Source: bbc.com