Matthews (upper body) will not take part in Friday's matchup with Boston, Mark Masters of TSN.ca reports.

Matthews will miss his second consecutive outing due to his upper-body malady. Considering the Leafs are heading into a back-to-back versus the Bruins, it seems doubtful the center will be ready in time to play Saturday either -- although he has yet to be officially ruled out. Even without its star talent, Toronto still managed to register a win against Minnesota on Wednesday with Nazem Kadri stepping into the top-line role.