Watch: Kucherov goes offside to negate Karlsson goal

As if offside reviews aren't stirring enough controversy, the much-debated challenge process reared its head at the NHL All-Star tournament Sunday.

Erik Karlsson thought he scored the go-ahead goal for the Atlantic Division in the second semifinal against the Metropolitan Division, but Barry Trotz challenged the play in the hope that Nikita Kucherov would be deemed offside.

Kucherov was coming off on a change as Karlsson entered the offensive zone.

Referee Wes McCauley emphatically announced that the Tampa Bay Lightning sniper was in fact ruled to be offside on the play, thereby negating the goal.

Kucherov got the last laugh, though, notching a hat trick to lead the Atlantic Division to a 7-4 victory and ensuring it a spot in Sunday's All-Star Final against the Pacific Division.