In the third period of a tight contest, Stone was tripped by Stars forward Roope Hintz, causing him to lose balance. As he fell to the ice, he took out Heiskanen’s leg. The blue liner immediately grabbed his left knee and was in visible pain as he headed towards the tunnel with the help of his teammates.

Dallas Stars defenseman Miro Heiskanen was forced to exit Tuesday's game against the Vegas Golden Knights after colliding with Mark Stone.Stone appeared to lose balance while chasing down Heiskanen and ended up taking out his leg.

Miro Heiskanen was injured when Vegas Golden Knights captain Mark Stone was tripped by Stars forward Roope Hintz and slid hard into Heiskanen's left leg midway through the third period. Heiskanen was slow to get up and had to be helped down the tunnel to the locker room. Stone was given a tripping penalty on the play.

Las Vegas’ Stone fell into Heiskanen’s left knee in an awkward collision, which forcing Dallas’ top defenseman out of the game.

Defenseman Miro Heiskanen was injured in the third period of the Dallas Stars’ 4-3 overtime victory over Vegas after taking a hit from Golden Knights captain Mark Stone

As if the Golden Knights’ rivalry with the Dallas Stars needed more fuel to the fire. Captain Mark Stone’s tripping penalty on Dallas defenseman Miro Heiskanen at 7:56 of the third period was a chaotic moment that proved to be the turning point in the Knights’ 4-3 overtime loss Tuesday at T-Mobile Arena.