Heat's Chris Bosh won't play vs. Knicks

MIAMI -- Forward Chris Bosh will be sidelined on Thursday night when the Miami Heat face the New York Knicks at Madison Square Garden.

"He is not going with us [to New York]," coach Erik Spoelstra said. "He will not be playing and we'll continue to monitor him every day from here."

Bosh suffered a high ankle sprain on Jan. 15 in Chicago when Bulls center Omer Asik landed on his leg. He has missed two games since the injury and there is no definitive target date for his return.

"I don't know," Bosh said. "I've been waiting and waiting and waiting. I don't really have a target. I did have a target of [Thursday], but that didn't work out, so I didn't make a target after that."

Spoelstra did not rule out the possibility that Bosh could return at some point during the Heat's upcoming stretch of four games in five days. But he was less than optimistic.

"We won't have an opportunity to practice for another 10, 12 days," diminishing the chances Bosh will get a full-contact workout soon, Spoelstra said.

"It's too early to tell. He's doing more than he did yesterday. To see him going full-speed, full-contact by Friday or Saturday, that would probably be very ambitious," Spoelstra added.

Bosh was able to perform some shooting drills on the Heat's practice court, which offered Spoelstra some reassurance.

"I was encouraged because I saw him shooting and I saw him doing some light drills off the dribble, and some of his post footwork drills," Spoelstra said. "It was progress from where he was yesterday and that's what we want."

The injury, which came from an unusual circumstance -- Asik landing on the back of Bosh's leg -- has been an unfamiliar experience for Bosh.

"High ankle sprains are so weird," Bosh said. "I've never had one. I really don't know how it's going to react and how long it takes to heal."

Bosh has been one of the Heat's most efficient players. With Bosh sidelined and backup Udonis Haslem out for the regular season with a foot injury, the Heat are missing production at the power forward spot.

"We've got a huge piece of our team missing," LeBron James said. "We had everything going. Our lineups were set. We knew what we were doing. We're a different team now."

In Bosh's absence, the Heat will use a variety of options at the power forward spot, including James.

"Even before I came [to Miami], I spent a lot of my time in the high post, in the Karl Malone area," James said. "I can play the position that [Bosh] plays. He's much more efficient than myself or [Dwyane Wade] is in the low post or at the elbow, but I'm picking up where C.B. has left off. We need that post presence for our shooters to get open."

Kevin Arnovitz covers the NBA for ESPN.com.