Carlo Ancelotti attributed Paris St Germain's shock defeat at Sochaux to a Champions League hangover.
PSG were beaten 3-2 by Eric Hely's strugglers, five days after taking a 2-1 first-leg lead in their continental last-16 tie against Valencia.
The result, coupled with Lyon's thumping win over Bordeaux, saw PSG's lead in the table cut to three points ahead of Sunday's clash with their bitter rivals, third-placed Marseille.
But Ancelotti told L'Equipe: "This defeat does not worry me.
"We did not go about things the way we usually do and our opponents were more aggressive. "Sochaux were strong and solid.
"We knew we could lose the game, and it happened. I demanded that the players pay attention early on, because I knew Sochaux would be in excellent condition, but we lacked balance and aggression, particularly in the first half.
"After the Champions League, in which we expended a lot of energy, it is normal.
"We have to focus ...