(CNN) -- Game 7 of the NBA Finals will be all about heart, Miami Heat superstar LeBron James said. The four-time MVP is seeking his second NBA crown when his Heat hosts the San Antonio Spurs on Thursday night. Both teams are well-prepared, he said, and they know each other well. They know what will work on offense, what to do on defense. What gives a team an edge will be each player's mental makeup. "I think it's about heart and determination at this point," he said Wednesday. James sparked the Heat to a comeback win in Game 6, hitting a key 3-pointer in the final 20 seconds of regulation.
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"It's about heart and determination at this point," LeBron James says
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He says he will wear his signature headband for the final game
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Spurs star Tim Duncan says he and teammates can't be tired
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Game 7 is in Miami on Thursday night
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He had a triple-double -- 32 points, 11 assists and 10 rebounds -- as the @placeholder won 103-100 in an overtime game many commentators have called one of the best NBA playoff games ever.
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"He was about doing whatever it took," @placeholder guard Dwyane Wade said.
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Early in the season, the Spurs sent Duncan and three other players back to @placeholder for rest instead of to a contest in Miami that ended a six-game road trip.
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There were no fatigued @placeholder on Wednesday, he said, after a season of more than 100 games over nine months.
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"We're not tired in any way," said the 37-year-old @placeholder, who played 44 minutes on Tuesday.
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For James, if the @placeholder don't win, it's a season down the drain.
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He told reporters Wednesday he would be antsy and nervous before @placeholder, but that's how it should be.