Miami Heat center Alonzo Mourning missed Tuesday night's game against the Atlanta Hawks with an upper respiratory infection.

It's the first game Mourning hasn't been available for this season. He entered Tuesday leading the NBA in blocked shots (3.56) and ranks third in field-goal percentage (.557), plus has averaged 10.3 points and 7.8 rebounds in 27 minutes per outing.

Mourning practiced Monday — which was the second anniversary of his kidney transplant surgery — but felt much worse on Tuesday, when the Heat opened a four-game homestand.

Miami also faced the Hawks without point guard Jason Williams, who missed his ninth game because of knee tendinitis.

INJURED OKAFOR STAYS HOME: Bobcats forward Emeka Okafor had an MRI exam on his sprained right ankle Tuesday in Charlotte and did not accompany the team to Chicago.

Okafor, averaging 12.9 points and a team-high 10.1 rebounds, was injured late in the third quarter of Monday's overtime victory over Sacramento when he collided with the Kings' Francisco Garcia while going for a rebound. He rolled around momentarily, grasping his leg, and was unable to put pressure on it as he left.

The results of the MRI were not immediately available.

"I don't have the courage to inquire right now," Charlotte coach Bernie Bickerstaff said before Tuesday's game.

Besides Okafor, starting guard Kareem Rush (sprained left index finger), forward Melvin Ely (flu-like symptoms) and center Jake Voskuhl (sprained right ankle) stayed home. Rush, second on the team with 13.5 points per game, aggravated an injury that has bothered him on and off for about a month during Monday's game.

The Bulls were without leading scorer Luol Deng, who bruised his right knee in Saturday's victory over Boston. An MRI taken Monday was negative.

MAVERICKS COACH AVERY JOHNSON EJECTED: Dallas Mavericks coach Avery Johnson was ejected from Tuesday night's game against the Los Angeles Lakers after being hit with two technical fouls early in the third quarter.

Steve Javie called technicals on Johnson and Mavericks star Dirk Nowitzki with 10:16 left in the period after Nowitzki was inadvertently struck in the face by Kobe Bryant but was called for a foul.

Johnson picked up his second technical 2 1/2 minutes later, leaving with the Mavericks trailing 68-50. Bryant had 41 points at that stage — five shy of his season high.