The Italian goalkeeper says that his side's title rivals will punish any slip up in the race to finish at the top of Ligue 1 and is hoping for a "special" treble win
However, Sirigu feels that there is still a chance that his side could become unstuck and has told his team-mates to give their all in all four competitions.
"We must stay focused," he told the press. "We know that Monaco and Lille will not make a lot of mistakes before the end of the season.
"As we are committed to the cup and the Champions League, it is especially important to keep continuity in our results.
"Choices do not exist. We cannot afford to make choices and be competitive. We must maintain our momentum.
"We are lucky to still be in all competitions and we want to go all the way in each. [A treble] would be something special but it is very difficult. We are in January; it is a long road to the end of the season."