"Wild coach Todd Richards knows all about concussions. He knows they're a nuisance, that they're scary and that the timetable for a return is about as cloudy as one might feel after sustaining one.

After Monday, he also knows that another of his players is out indefinitely because of one.

Tests done Sunday confirmed that forward Petr Sykora suffered a concussion Saturday, and Richards said he thought Sykora would undergo more tests this week.

Sykora hit his head on the glass on a check by Dallas pest Steve Ott during the third period of the Wild's 3-2 victory.

Ott, who has twice been suspended by the league for his conduct during his career, did not receive a penalty, but Richards called the hit on Sykora "questionable.""