The French boss watched on, as Radamel Falcao cancelled out Zlatan Ibrahimovic’s opener and the game ended 1-1.
Blanc feels his men were too profligate in front of goal and that is why they did not get all three points.
“Without taking anything away from Monaco, because they played well, I think that if we analyse the game and our numbers of chances, we deserved to win,” Blanc said at a press conference.
“I think we needed to be more efficient with taking opportunities. When you have so many chances, scoring only once is not good enough to secure the points at this level.
“But I have to say that to get so many chances in such a game is not easy and the players deserve credit for creating the opportunities.
“It is a real disappointment though because if we had taken just one more of our many chances, I think we would have won the game without any problem.”
PSG sit second in the Ligue 1 table, trailing leaders Monaco by two points.