Game 7 between the Philadelphia 76ers and Boston Celtics averaged a 3.9 rating and 8.44 million viewers on ABC.
The number represents the third most-watched early round playoff game since 2011, with the top four coming this postseason.
The game peaked with 10.17 million viewers.
The NBA playoffs are averaging 5.23 million viewers on ABC and ESPN, the networks' highest average since acquiring its television rights.