Game 7 between the Miami Heat and the Boston Celtics on Monday averaged 12 million viewers with a 5.8 rating on TNT.
The number represents the biggest audience outside of the NBA Finals since 2018.
The game, which peaked at 14.2 million viewers, is also the third highest basketball viewership ever for TNT and the fifth largest ever on cable.
Game 7 is the seventh biggest audience outside of the NBA Finals since the current media rights deal began in the 2002-03 season.
Game 6 averaged 8.71 million viewers.