Houston Rockets superstar James Harden has a high ankle sprain as a result of the injury he suffered on Sunday against the Sacramento Kings and could miss several games, according to ESPN NBA insider Marc Stein.

More Rockets coverage: The Dream Shake

The "high" designation means the injury is more severe and will likely require a longer rehabilitation process than a normal sprain. According to About.com's Dr. Jonathan Cluett, such an injury could require a six-week healing process or even require surgery if deemed unstable.

The fifth-year guard was on his way to another All-Star season before the injury and is one of the top players in the NBA. Through 21 games, he's averaging 24.7 points, 5.8 assists, 4.7 rebounds and 1.3 steals per game.

He's been productive at both ends of the floor and is the Rockets' offensive catalyst, meaning any sustained absence would be a big blow to Houston's bid to compete for the Western Conference crown.

The Rockets are currently situated in second place in the Southwest division with a 16-9 record. Their second-ranked offense from a points per game perspective (107.0) is sure to struggle as long as he's out, which by the looks of things could be a few weeks and total several games.

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