The Tkachuk brothers have become stars during the 4-Nations Face-Off. Everything started Saturday night against Canada when three fights broke out in the opening nine seconds. Matthew Tkachuk was first up against Brandon Hagel and since then,

Matthew Tkachuk left the United States' 4 Nations Face-Off victory over Canada because of what coach Mike Sullivan called a lower-body injury.

It was Tkachuk who ignited the fireworks at the start of the United States’ 3-1 win against Canada on Saturday in Montreal, fighting Canada forward Brandon Hagel at puck drop. This after he scored twice in a 6-1 win against Finland in the tournament opener for the U.S.