New York Knicks guard J.R. Smith, who played in Game 3 on Saturday despite a high fever, did not participate in Sunday's practice.
Kenyon Martin also missed Sunday's practice with an illness.
It is assumed both will play in Tuesday's Game 4 of the second-round series against the Indiana Pacers, but it depends on their recovery.
"Kenyon's kind of coming down with [illness], too," Knicks coach Mike Woodson said, according to ESPN.com, "so we've got to be careful that this thing doesn't spread, and other guys start dropping."
Smith scored nine points on 4-for-12 shooting during the Knicks' 82-71 loss to the Pacers on Saturday that gave Indiana a 2-1 series lead.
He's made 11 of 52 shots (21.2 percent) in three games this series after an 8-for-27 performance (29.6 percent) in the final two games of New York's first-round matchup with the Boston Celtics.
"We've just got to hope that over these next two days he can get some energy back because we desperately need his offense," said Woodson.
Woodson said that if Smith doesn't return to form, he will try "mixing and matching" some other players into the rotation to find some offense.
"At this stage of the game, most playoff teams are pretty set, and we're jumping around a little bit now," Woodson said.