The former Tottenham boss has taken over from Thomas Tuchel at Parc Des Princes in his first job in management since being sacked by Spurs just over a year ago.
Moise Kean cancelled out Romain Hamouma’s opener in the first half but PSG were unable to find the net again as they let Olympique Lyonnais, who beat RC Lens 3-2, open up a three-point lead at the top of the standings.
PSG did, however, move up to second on 36 points from 18 games, leapfrogging Lille on goal difference after the northeners slumped to a 2-1 home defeat by Angers.
“It was a difficult game. We need to keep working. I’m not looking for excuses, we need to improve the way we play and to improve our performances,” said Pochettino.
“We are PSG, we must win. I arrived three days ago but I’m happy with the way the players tried to apply what we worked on during practice.”
Additional reporting by Reuters.