Portland Trail Blazers Head Coach Nate McMillan underwent successful surgery Monday to repair a ruptured right Achilles tendon.

He is expected to make a full recovery and return to the bench for the Trail Blazers’ Dec. 15 game vs. Sacramento. The injury occurred during a Dec. 4 practice.

Dr. Jay Crary performed the surgery at Southwest Washington Regional Surgery Center in Vancouver, Wash.

Lead Assistant Coach Dean Demopoulos will serve as the team’s head coach in McMillan’s absence, starting tonight at New York.