07:19 AM ET 10.30 | Three years ago, LeBron James and Erik Spoelstra were essentially strangers when they entered into what began as a sometime uneasy partnership. So much of Miami's future is uncertain, but James has to understand the best reason for him to stay the course is the fact that Spoelstra isn't joining him on the market. On the eve of training camp, Spoelstra signed a four-year contract extension. The message was unmistakable: If James wants the stability that comes with continuity and trust, with elite ownership, executives and a coach, there's no reason for him to leave Miami. "They're more intertwined than they've ever been," says a league source closely connected to James and Spoelstra. "LeBron knows he plays for one of the elite coaches in the game, and that maybe wasn't the case when he got there."