With 98 seconds left in regulation time in the teams’ last preliminary-round game, Mathiasen-Wejse checked Slovak player Erik Smolka to the head.

Smolka skated around the Danish net trying to get the puck and push it towards the goal when Mathiasen-Wejse hit him to the head with his shoulder. Smolka fell to the ice and had to be helped to the dressing room.

Based on the clip and the player’s statement, the 2018 IIHF World Junior Championship Disciplinary Panel determined that the player changed his skating direction in the last moment to deliver a check to Smolka, who was in a vulnerable position because the puck was not near him. Instead of letting his opponent pass by, the player lunged toward his head and caught him up high without warning, which is an infraction of IIHF Rule 124 (Checking to the head or neck).

Considering the remaining time of the game and the score of 5-1 for Slovakia, the action was both unnecessary and dangerous, and recklessly put the health of the opponent at risk.

Therefore Mathias-Weise was assessed a one-game suspension, specifically for Denmark’s upcoming game on 2nd January 2018 in the relegation round against Belarus.