The Thunder have until January 25th to sign Russell Westbrook to an extension and sources say that "both sides are dug in right now."

Oklahoma City is hoping to preserve cap space to also re-sign James Harden and Serge Ibaka next year, but Westbrook could be eligible for 30 percent of the team's cap next season.

If Westbrook is selected to another All-NBA team, he could get a five-year, $94 million extension. The Thunder hope to sign him to the smaller five-year, $80 million extension.

Several sources close to the talks believe the sides will find a deal somewhere between the two numbers.