Arik Armstead was able to play for the San Francisco 49ers in their win over the Philadelphia Eagles, but he is unlikely to be available as they aim to clinch a playoff spot on Sunday.

Armstead will not practice on Wednesday because of foot and knee injuries. The defensive tackle missed a pair of practices with a foot issue last week and left the Eagles game in the fourth quarter because of the injury.

Head coach Kyle Shanahan revealed on Monday that Armstead had also sustained a knee injury and, in an update during his Wednesday press conference, said the 2015 first-round pick could be out for a couple of weeks as a result.

Discussing the nature of the problem, Shanahan said: "It's not ACL/MCL, I'd be surprised if he's ready this week. Still haven't ruled him out yet, might be a week or two."

Asked if it could be a long-term issue, Shanahan replied: "Hope not. Can't rule him out for this week. Gotta see how long it lasts."

Armstead is enjoying an impressive season on the interior defensive line alongside Javon Hargrave.

He ranks seventh in Pro Football Focus pass rush grade among interior defensive linemen and has 42 pressures to his name along with five sacks and 13 quarterback hits with four tackles for loss.

Javon Kinlaw, the 49ers' first-round pick in 2020, will likely step in as the starter next to Hargrave in Armstead's anticipated absence.

Kinlaw had two sacks in the 42-19 win over the Eagles, marking his first since his rookie season.

The 49ers can clinch a playoff berth if they beat Seattle and either the Minnesota Vikings or Green Bay Packers suffer defeat in Week 14.

Deebo Samuel joins Jerry Rice in exclusive club with latest award

Recognition for a dominant display.