The Swedish frontman picked up a hamstring strain in the first leg of the UEFA Champions League quarter-final clash between the sides, ruling him out of this week's second leg.
Yet Cavani, who scored against Reims at the weekend in Ibrahimovic's absence, is sure he can shine in a more central attacking role.
"I am better in the axis," he is quoted as saying by L'Equipe. "This is normal; this is my job. It's a great responsibility for me."
PSG won the opening encounter 3-1 at Parc des Princes and Lucas Moura, who came on in place of Ibrahimovic on Wednesday, says the Ligue 1 leaders have a "responsibility" to progress.
"We have a great advantage," he added. "We will be very focused.
"It will be hard but we can do it. We have a responsibility to finish the job."
‘I don’t think Liverpool would look at Ollie Watkins, a striker isn’t a pressing issue for them – it’s Arsenal who need one’ Former Reds star explains why his old club don’t need an out-and-out forward this summer
‘He’ll still be playing at 40 at a good level because he’s in such good shape and looks after himself so well. He does everything to be a top professional’: Ex-Liverpool coach insists Mohamed Salah has plenty more miles in the tank
