Goals from Zlatan Ibrahimovic and Adrien Rabiot give the French giants some hope going into next Tuesday’s return fixture at the Etihad Stadium.
The Ligue 1 champions also saw Ibrahimovic have a penalty saved by Joe Hart early on with the game still goalless.
“Collectively we know we should have done better,” said Motta. “There was less organisation than usual. When the ball fails to go at the right rhythm we lack quality. We allowed Manchester City to counter-attack and it cost us dearly.”
“Still we have showed in the past we are capable of turning such situations around. We must do the same as usual, keep a high percentage of possession and chances will come,” said Motta.
Laurent Blanc’s side will also be without David Luiz and Blaise Matuidi through suspension for the return leg in Manchester after both players were booked at the Parc des Princes.
Matuidi said he was disappointed with the result as Les Parisiens did not perform well on home soil:
“This is Champions League. We knew we should avoid conceding and did so twice. City had great attacking capabilities and it will be tough. We did not necessarily expect this,” he said.
“It’s sad getting the yellow card but that is football. We did not do everything perfectly, and lacked calm in key moments.”
PSG owner Nasser al Khelaifi echoed a similar feeling: “It’s not the best result but the good thing is we have to go and win in Manchester. Tonight was not a great result for us.”
Elsewhere, Manchester City manager Manuel Pellegrini said his side must not repeat the defensive errors in the second leg.
“In the first half we made an important mistake that we cannot continue to do if we want to stay in the competition,” said Pellegrini of the awful mix-up between Hart and Fernando that allowed Ibrahimovic to score.
“The second goal of PSG was offside. It was not a mistake of the defence but of the linesman.
“But it is important also to keep that mentality because when you receive the goal that we conceded in the last minute of the first half and then you concede a goal that is offside, it is not easy to try to recover, but I think this team has the personality and they believe in what they do.
“They always try to attack and we scored the second goal.”