Heat center Jermaine O'Neal missed the team's win over the Nets on Saturday night with a bruised left hip.
He sustained the injury on Thursday night in a collision with LeBron James midway through Cleveland's win over Miami.
O'Neal has gone through extensive treatment since suffering the injury.
"He feels much better than he did [Friday]," coach Erik Spoelstra said on Saturday. "He felt [then] like he got hit by a train. It's not quite the type of relief and movement we were hoping for."