Toronto Maple Leafs captain Auston Matthews continues to be sidelined by an upper-body injury that has not progressed as expected, forcing him to miss more time.

Matthews has sat out the Leafs' past three games with his ailment, which is related to a problem he has dealt with since the preseason. Toronto's star center did take part in the team's optional morning skate Saturday -- the first time he'd been on the ice in a week -- but hasn't gone out again since then.

Coach Craig Berube said that's by design.