The Blaugrana conceded first position to Real Madrid in La Liga this weekend, but sit just three points behind Los Blancos with 13 games remaining.
"We're just one game off being league leaders so it's not too troubling," he told the club's official website.
"These things can happen; when you attack it's possible for them to score. Sometimes you don't feel comfortable on the pitch, and you can't maintain possession.
"Their second goal was a real blow to us."
Pique, meanwhile, has been ruled out of action for next two weeks with a calf injury.