Paris Saint-Germain coach Carlo Ancelotti says Alex's own goal in Sunday's 2-2 draw with Saint-Etienne was the turning point in the game.
The capital club had raced into an early 2-0 lead courtesy of Javier Pastore and Zlatan Ibrahimovic, but their advantage was halved when the Brazilian turned the ball past his own goalkeeper, sparking a comeback.
"This is football," Ancelotti told reporters.
"The turning point was perhaps the goal that we conceded at the end of the first half. If we'd kept our 2-0 lead, the second half would have been much easier."
PSG saw title rivals Lyon and Marseille drop points this weekend, but Ancelotti feels his side still have some work ahead to secure the Ligue 1 crown.
"Saint-Etienne have a lot of intensity. This is a decent result at this point in the season. The championship is not over. There are still many matches to go," he added.
The Parisians have a five-point lead at the top of the table going into the international break.