CHICAGO, April 30 (Ticker) -- The Chicago Bulls will head back to Florida with their best-of-seven first-round series with the Miami Heat even at two games apiece. Unfortunately, they may also be without their best low-post threat.

Kirk Hinrich collected 21 points - including a huge 3-pointer with just over a minute to go - and nine assists as the Bulls posted a 93-87 triumph over Heat.

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Andres Nocioni scored 24 points and Ben Gordon added 23 for the Bulls, who lost center Tyson Chandler to an apparently serious right ankle sprain in the final minute. A Bulls official said Chandler has a mild-to-moderate sprain and is day-to-day, then added that the center still had to go for X-rays.

"We have really progressed since the games in Miami," Gordon said. "The last two home games we have really buckled down to make the plays necessary to win the game. Right now we have a lot of momentum and confidence heading into Game Five."

The Heat rallied from an 13-point third-quarter deficit to take an 83-82 lead on a 3-pointer by Derek Anderson with 2 1/2 minutes to play. Hinrich tied the game by splitting two free throws 15 seconds later before Chicago took an 85-83 edge on a teardrop by Chris Duhon with 1:42 left.

"We made a lot of big plays to win this game," Bulls coach Scott Skiles said. "We played great defensively, except for the stretch where they drove by us by making some threes. Then (when) we had to be, we were aggressive."

After All-Star guard Dwyane Wade missed a jumper for Miami, Hinrich nailed a long 3-pointer with the shot clock winding down for an 88-83 lead with 1:09 to play.

"I knew I was behind the line a little ways," Hinrich said. "The clock had gotten down to about five seconds and they were off me, so I took a rhythm dribble and let it go."

Wade pulled Miami within 88-85 with a layup five seconds later and Hinrich turned the ball over on Chicago's next possession. With about 37 seconds left, Wade missed a shot over an onrushing Chandler, who rolled his ankle upon landing. Udonis Haslem and Wade both missed follow shots before Duhon grabbed the rebound, got fouled and sank two free throws to essentially ice it.

"After we tied them at 80, we starting putting them on the line," Wade said. "They are a tough team to beat when you do that. Their guards (were) not penetrating on us, just getting picks on picks on picks."

Antoine Walker scored 21 points and Wade added 20 and 10 rebounds for the Heat, who host Game Five on Tuesday.

"All they did was hold serve at home," Walker said. "That's what they are supposed to do. Tuesday night will be the biggest game of the series. We are a talented team and it's time to step up."

Coming off an eight-point Game Three, All-Star Heat center Shaquille O'Neal was in foul trouble for much of the contest but finished with 16 points in just 24 minutes of action. He declined to speak with reporters after the game.