San Antonio put on an offensive clinic, playing their ball movement, motion offense to perfection combined with remarkable shooting accuracy as they hit 25 of 33 shots for a 75.8 percent shooting percentage that was an NBA Finals record for a half.
The Spurs built their lead to 25 points at 55-30 early in the second quarter after hitting 19 of their first 21 shots from the field before Miami clawed their way back to within 14 points before another San Antonio spurt.
Kawhi Leonard led the Spurs with 18 points with Danny Green adding 13 and Tim Duncan 10 points.
The best-of-seven series is tied 1-1.
(Reporting by Larry Fine in New York; Editing by Gene Cherry)