Australia's top tennis player Nick Kyrgios has blamed "unfair and unjust treatment" at the hands of his country's Olympic committee for his decision not take part in the upcoming Rio Games.

The world No 19 joined Bernard Tomic in withdrawing his name from consideration on Friday, a month after Australia's chef-de-mission Kitty Chiller said the pair were among a number of athletes whose behavior was being monitored.

Tomic, ranked No 22 in the world, ruled himself out in mid-May because of his busy playing schedule but Kyrgios laid the blame squarely at the door of the Australian Olympic Committee (AOC).

"It is with a heavy heart that I have had to make a decision not to compete at the 2016 Olympic Games in Rio de Janeiro," Kyrgios said in a statement on Friday.

"Representing Australia at the Olympic Games has been a dream of mine since I was a kid. Unfortunately, while I have expressed every intention of trying to win a medal for my country in Rio, it's very clear to me that the Australian Olympic Committee has other plans."

Kyrgios said the AOC's treatment of him over the past month had been "unfair and unjust" and had made "crystal clear" its opposition to his being part of the team.

Tennis Australia will nominate the players to take part in the Aug 5-21 Games on June 30, but they must then be ratified by Chiller and the AOC.

"The AOC has chosen to publicly and privately disparage me," the Kyrgios' statement continued.

"The AOC's unwarranted attacks on me demonstrate the organization's inability to understand the circumstances surrounding highly competitive sports."

Kyrgios said he did not want his quarrel with the AOC to distract the Australian team from preparations for Rio. adding he hoped to represent his country at a future Olympics.

The 21-year-old has become a divisive figure in Australia, particularly after a string of unsavory incidents over the past 12 months.

He was given a suspended ban by the ATP last year for an off-color comment directed at Stan Wawrinka and was booed by the crowd at the Australian Open after a running battle with an umpire.

Tennis Australia chief Steve Healy offered Kyrgios his full support on Friday and echoed the player's disappointment that "he has been put in this position".

"Nick's performances this year have improved," Healy said in a statement.

"Nick is a passionate competitor and he's working hard to learn and mature in a highly pressurized environment where he is under constant public scrutiny."

Chiller has made good behavior one of her main priorities for Rio after Australia's disappointing 2012 Olympics was accompanied by a crisis of team culture on the swimming squad, which a later report said had become a "toxic" environment.

"At this point, Nick Kyrgios, or any other tennis athlete, has not been nominated for selection on the Australian Olympic Team," Chiller said in a short statement on Friday.

"In regard to selection, every athlete in contention is treated equally and fairly by the AOC.

"We have no further comment on this issue."

(China Daily 06/04/2016 page11)