Andrew Bogut believes he let his Australian teammates down during medal-game losses against Serbia and Spain during the Rio Olympics.
The veteran centre has also lowered expectations he would have one last crack at helping the Boomers to their first Olympic medal in 2020 at Tokyo.
"I was kind of disappointed because I thought I let the team down toward the end," Bogut, discussing his Rio experience, told ESPN.
"The last couple of games, I had nothing, nothing left in the tank and didn't help us at all."
Bogut, 31, said a knee injury suffered in the NBA Finals meant he went into Rio without much conditioning.
In the early games where he and the Boomers performed sensationally, Bogut said he was playing on adrenalin.
But then he flamed out in the final games against Serbia and Spain when medals were on the line.
He also blames the officials from the world basketball body, FIBA, for the Spain bronze medal game loss in which controversial fouls were called in the final seconds leading to match-winning free throws.
"The Serbia game was the one I was really disappointed in," he said.
"We just got absolutely annihilated.
"The Spain game, FIBA had its say in that one.
"I'm still a firm believer in that."
Looking ahead to the next Olympics when he will be in his mid-30s, Bogut said he would consider it if he was healthy.
"I'd like to, of course, but the national team's dream is starting to dwindle as the days go by," he said.
The Golden State Warriors shipped the 11-year NBA veteran to the Dallas Mavericks in the off-season to make way for All-Star Kevin Durant.
Bogut suspects the Warriors had been working on the move for months.
"That's part of the business," he said.
"I think the deal was done long before the summer.
"I think it was done - obviously, KD didn't make his concrete decision - but I think our organisation knew for a while what was going to happen."
