Matthews (upper body) has not skated since the weekend and remains in Toronto, meaning he'll miss Wednesday's game against the Capitals, Lance Hornby of The Toronto Sun reports.

Matthews (upper body) is doubtful for Tuesday's game against Ottawa, David Alter of The Hockey News reports.

Matthews (upper body) is skating for the first time this week at practice Saturday, according to David Alter of The Hockey News.

Matthews (upper body) was put on injured reserve Friday, retroactive to last Sunday.

Coach Craig Berube said that Matthews (upper body) would not be available for Friday's home game versus Detroit. according to David Alter of The Hockey News.

Matthews (upper body) was unavailable for Friday's optional skate, according to Terry Koshan of The Toronto Sun.

Matthews (upper body) was a non-participant at practice Thursday, Jonas Siegel of The Athletic reports.

Matthews is day-to-day with an upper-body injury and will miss Tuesday's divisional matchup against the Bruins.

Matthews scored a power-play goal in Monday's 5-2 win over the Lightning.

Matthews notched an even-strength goal and two power-play assists in Wednesday's 6-2 win over the Kings.