The game, which the Heat won to tie the series with San Antonio, easily dominated the national ratings. Updated ratings showed the game averaging 16.2 million viewers.
ABC won the night by a wide margin in total viewers and the 18-to-49 age group.
In Orlando, the game averaged 274,100 viewers and topped the night's ratings.
Nationally, the prime-time averages in total viewers were ABC with 12.1 million, CBS with 6.6 million, Fox with 3.8 million, NBC with 2 million and The CW with 670,000 for reruns. The most-watched show on another network was "The Big Bang Theory" on CBS with 8.6 million.
Here's how the other CBS series fared: "Two and a Half Men" with 6.3 million, "Person of Interest" with 6.5 million and "Elementary" with 5.6 million.
On ABC, Jimmy Kimmel's prime-time special amused 4 million, and the pre-game show attracted 5.7 million.
Fox's best showing came from "Hell's Kitchen" with 5.1 million.