In what had mostly been a back-and-forth game through three quarters, the Spurs took the game's first double-digit lead, at 97-87, early in the final period on a Gay 3-pointer. Prior to that score, the Spurs at one point had held a nine-point lead and the Heat and eight-point lead.
Even with Tyler Johnson up to 21 points by that stage and Waiters at 16, the Heat went into the fourth quarter down 86-82, at 0-10 entering the night when trailing at the end of the third period.
Spurs reserve guard Bryn Forbes, 5 of 5 on 3-pointers to the stage, was up to 17 points entering the final period.
At 9 of 18 from beyond the arc over the first two periods, the Heat moved to a 58-57 halftime lead, with Tyler Johnson up to 11 points by that stage and Dragic with six assists at the intermission.
The Heat pushed to a 35-27 lead going into the second period, with James Johnson up to nine points by that stage.
The Heat shot 6 of 10 on 3-pointers in the opening period, with their first five attempts of the night coming from beyond the arc.
It was not exactly the start expected, with the Heat entering 27th in the league in scoring and the Spurs entering second in the league in defense.
The Spurs won the first game of the two-game season series 117-100 Oct. 25 at AmericanAirlines Arena, led by Pau Gasol's 31 points and 22 off the bench from Gay. The Heat also were without center Whiteside for that game.
The Spurs entered having won eight in a row from the Heat, seeking to sweep the two-game series for the fourth consecutive season. The Heat entered having lost six of their previous seven visits.
The Heat were coming off Sunday's 123-95 loss to the Warriors. The Spurs were coming off Monday's 96-93 victory over the Pistons.
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