Portland Trail Blazers Head Coach Nate McMillan will undergo surgery to repair a ruptured right Achilles tendon on Monday, Dec. 7.

McMillan sustained the injury during Friday?s practice and will miss Portland?s upcoming four-game road trip to New York, Indiana, Cleveland and Milwaukee. He will coach Saturday?s game vs. Houston.

Lead Assistant Coach Dean Demopoulos will serve as the team?s head coach in McMillan?s absence.