INDIANAPOLIS -- The New York Knicks were missing a third player in practice Monday as Iman Shumpert sat out due to soreness in his left knee, the team said.

The extent of Shumpert's soreness was unclear, but Shumpert and coach Mike Woodson said they thought the forward would play in Game 4 on Tuesday night, when the Knicks' Eastern Conference semifinal series against Indiana resumes. The Pacers lead 2-1.

J.R. Smith and Kenyon Martin also missed the session due to lingering illnesses. Woodson said they will be game-time decisions.

Shumpert said the soreness was related to a fall he took in Game 3 and not the surgery he underwent last year on the knee. Shumpert appeared to bang the knee in a collision in the second half of the Knicks' loss Saturday. He had surgery to repair a torn anterior cruciate ligament last year and had been relatively pain-free since his return.

Smith and Martin had also missed practice Sunday.

Smith first came down with the illness on Friday night. He played through a fever on Saturday but shot just 4-for-12. Smith is shooting 12-for-52 in this series.

Woodson said Monday that Martin had come down with the same illness that affected Smith. The coach expressed concern that the illness, which Smith described Saturday as a "virus," could spread to other teammates.