How long will Greg Popovich remain a coach?

San Antonio Spurs coach Greg Popovich was named the new head coach of Team USA Basketball this past Friday 10\23\2015. Which beg’s the questions of how long will Greg Popovich coach? This question is regarding his current contract with the San Antonio Spurs through 2020, after which will Greg Popovich still continue on with Team USA? Given his level of commitment and his drive for excellence it would not be surprising to see coach Pop continue his coaching career with Team USA after he retires from the NBA. Only time will tell if the 66 year old Greg Popovich still has a passion for the game of basketball beyond 2020.