LeBron James has admitted that he is not sure whether he will agree a contract extension with the Miami Heat.

The two-time finals MVP claims that he would like to see out his career with the Heat, but refuses to rule out the possibility of him joining another franchise as a free agent next summer.

"I have absolutely no idea," James told ESPN.com when asked about his plans for next summer.

"I would love to spend the rest of my career in Miami with this great team and great organization as we continue to compete for championships. That's ideal.

"But we don't know what may happen from now to the end of the season. That's the nature of the business. It's the nature of not knowing what tomorrow brings."

The Cleveland Cavaliers are reported to be interested in signing their former player for the second time next summer.