If they want to keep their playoff hopes alive, they have to win the next three games, starting with Tuesday's game in Boston. But Matthews being sick is a big concern. He's been dealing with an illness, maybe from bad food, and had to sit out part of Game 4 and miss some practices.
Without Matthews, the Leafs have been struggling to score goals. He's been a big part of their offense in this series. If he can't play in Game 5, it could be really tough for the Leafs.
If the Leafs don't win Game 5, it could mean the end of their playoff dreams. And if that happens, there might be big changes for the team in the offseason.