The altercation took place away from the puck with Toronto losing 42 with five minutes to play in the game
HAMILTON - Toronto Maple Leafs forward Auston Matthews has a hearing with the NHL's department of player safety Monday.
Matthews cross-checked Sabres defenceman Rasmus Dahlin in the third period of Sunday's Heritage Classic at Hamilton's Tim Hortons Field.
The altercation took place away from the puck with Toronto losing 4-2 with five minutes to play in the game.
Both players exchanged shoves inside Sabres goaltender Craig Anderson's crease.
Matthews then cross-checked Dahlin to the side of the head.
The Buffalo player tried to throw a punch in retaliation.
Matthews has no history of supplemental discipline.
Buffalo won the outdoor showcase 5-2, with Matthews scoring his 45th goal of the season in defeat.