"So I grew up playing all positions and getting back to that with Coach Pop is just like coming back into myself."
Brown added Popovich has already helped him improve.
"Being physical on the rebounds. Pop is being honest with me," Brown said.
"I'm trying to let all my flaws come out now as we have some of the best coaches to ever coach in this gym so I can get the right direction I need."
Popovich’s nightly team dinners have further helped the Celtics grow closer.
"Even guys I've been playing with for two, three years I'm learning more about them," Brown said.
"When you are outside your comfort zone, halfway across the world, you see things come out of people that you never expect over a glass of wine."
If the Celtics beat the Spurs during the NBA season and Brown is showing the fruits of his work with Team USA, he knows Popovich won't regret helping him this campaign.
"I don't think he's going to regret it," Brown said.