The Ligue 1 champions eventually ran out 4-0 victors over their fifth-tier opposition, but Sylvain Jule's own goal was all that separated the sides until the 70th minute, when Neymar finally got the better of the impressive Clement Daoudou.
Kylian Mbappe's penalty added further gloss soon after, with Julian Draxler getting in on the act late on to give a flattering impression of PSG’s performance.
Tuchel acknowledged that his side’s showing may not have been reflective of the scoreline, but he stressed that he was nonetheless impressed with their display.
“I was expecting this type of match,” the German told reporters post-match.
“If you play seriously, it's not possible for a fifth division team to beat us. That's what the team did.
“We did two very intense and very serious training sessions, so I was confident before the match.
“It was not easy because the opponent was very organised and we lost a lot of easy balls.
“The last passes were not precise enough to score two or three goals in the first half. We have no injuries, we have won the merit and for that, I am happy.
“We can play better, but it was not necessary today, that's why it's a good start to the year for us.”
Moussa Diaby, who came on from the bench to score the winner in PSG's Coupe de la Ligue clash with Orleans in December, again impressed as a substitute, teeing up Neymar for the Brazilian's 17th goal of the season.
“Even at 1-0 after an hour of play, I knew we could always accelerate the match with players like Moussa Diaby and our technical skills,” Tuchel added.
“Moussa was decisive, it's important. I knew that the opponent could not play with this intensity for 90 minutes and we would find spaces between the lines in the last twenty minutes.”