The Heat are just 3-22 in San Antonio, though they did win this year even while James, Dwyane Wade and Mario Chalmers sat out the late-season meeting.
James had no cause for concern after Game 2, which validated his belief that he can depend on his teammates until he gets rolling, as he did late in the third quarter and well into the fourth.
But a little doubt seemed to creep into the Spurs' Big Three, unusual for a group that has been there, done that.
Duncan, Parker and Ginobili have teamed for 99 postseason victories together, second-most in NBA history, a trio that is well aware of how quickly things can change in the playoffs.
They changed really quickly in this series, about the time it took James to turn Tiago Splitter's dunk attempt into a forever finals highlight with a blocked shot.
"Of course if you look at the result, being 1-1, it's not bad. But you don't want to play like this in an NBA Finals," Ginobili said. "You don't want to give them that much confidence, and you feeling bad about yourself."
Duncan was admittedly awful in Game 2, shooting 3 of 13 for nine points. Parker offset his five baskets in 14 attempts with five turnovers, and Ginobili had three of the Spurs' 17 turnovers that led to 19 points.
The Spurs, like every other team in the NBA, know that there's no way to beat the Heat with that kind of ball handling.
"We have to play better. Definitely have to play better," Parker said. "You know, we're playing the defending champs. They're a great team. We knew they were going to come in and play with a lot more energy and play harder. That's what they did tonight.