The New York Knicks were without guard J.R. Smith, guard-forward Iman Shumpert and forward Kenyon Martin during practice Monday.
The Knicks host the Indiana Pacers on Tuesday for Game 4 of their Eastern Conference second-round series. The Pacers lead 2-1.
Smith and Martin have illnesses and are considered game-time decisions.
Smith played 25 minutes of Saturday's Game 3, despite a high fever due to the flu.
Shumpert has a sore left knee, the same one that was surgically repaired last season from a torn ACL. The New York Times reported that the knee is bruised and not related to the surgery. He said he plans to play Tuesday.