Many pundits have made Chelsea the favourites to advance through to the last four of the competition due to the fact that the second leg will be played at Stamford Bridge.
However, despite having admitted that Chelsea have an advantage with Jose Mourinho as their manager, Sirigu believes that there is little to separate the teams.
"Mourinho is very strong with the media. He is able to take the pressure off him and his team," Sirigu told RMC. "He brings the best out of players and has a great winning mentality, which is incredibly important in football.
"I am expecting a tough battle. It will definitely be a mountain to climb but we are already at their level. We can match them."
PSG have not reached the semi-finals of Europe's top club competition since 1995.