Emily Kaplan breaks the news that Auston Matthews will miss Game 5 vs. the Bruins with an illness. (1:03)
Keefe said it would be the Leafs' team doctors making the final call on whether Matthews would dress.
"He's working through things to try to make himself available to play. No determination at this time," Keefe said Tuesday morning. "We'll see how the rest of the day goes."
Matthews skated Tuesday prior to the team's optional morning skate at TD Garden. He spent 10 minutes going through some light drill work with assistant coaches and departed before the full session got underway.
It was the first time Matthews had been on the ice since being pulled by team doctors before the third period of Game 4 on Saturday.
Matthews played through his sickness in Game 3, a 4-2 Leafs loss, and played the first 40 minutes of Toronto's 3-1 defeat in Game 4. The Leafs' top center had his best outing in Game 2, tallying all three points he's earned this series, including the winning goal.
With Matthews unable to play, Max Domi moved up to Matthews' top line spot and William Nylander went to the team's second line. Domi also took Matthews' spot on the Leafs' sputtering power play, which entered Tuesday 1-for-11 in the playoffs.
