TORONTO -- Auston Matthews did not practice Thursday because of an upper-body injury and his availability for the Toronto Maple Leafs next two games is uncertain. The Maple Leafs have back-to-back games against the Detroit Red Wings on Friday (7 p.m. ET; TSN4, TVAS-D, FDSNDET) and the Montreal Canadiens on Saturday.

The Toronto Maple Leafs will play a massively important early-season contest against the Boston Bruins without their newly minted captain. It was announced by the Maple Leafs that superstar forward Auston Matthews would be out of the lineup on a day-to-day basis as he recovers from an upper-body injury.

Matthews will miss Tuesday’s game against the Bruins with an undisclosed injury that Craig Berube said had been lingering "a little bit."