Ottawa Senators forwards Clarke MacArthur and Jean-Gabriel Pageau were injured in Friday night's 5-1 win over the Montreal Canadiens.
Senators coach Dave Cameron said both are day to day.
Pageau blocked a P.K. Subban shot and limped off the ice in the third period.
MacArthur suffered a lower-body injury in the second period and didn't return.
After going down 3-0 in the series, the Senators cut the Canadiens' lead to 3-2 with Game 6 scheduled for Sunday in Ottawa.