A double from Zlatan Ibrahimovic and a Marquinhos effort put the home side out of sight by half-time at the Parc des Princes, with the 59-year-old quick to acknowledge the superiority of the Ligue 1 outfit in the European clash.
"We played against a very strong team that will go far in the Champions League," he conceded to A Bola. "We lacked the ability compared to PSG.
"In the first half we could not stop the build-up of PSG. To be 3-0 down at half-time was dangerous. In the second half we improved a bit, modified the system and Ibrahimovic did not get as much room. But it was still a heavy defeat."
Benfica defender Guilherme Siqueira, on loan from Granada, echoed his coach’s sentiments but still holds hope of his side progressing from the group and reaching the knock-out stages.
"It is true that the opposition team deserved this win, but we have to think now only of the next game. Everything is still possible," he added.
"We knew the difficulties we were going to find, but we have to recognise our potential and return to winning ways."
Benfica are currently third - behind Olympiakos on goal difference - in Group C on three points, and will play their next two group games against the Greek outfit.