Fiery Australian tennis star Nick Kyrgios on Friday pulled out of the Rio Olympics, blaming "unwarranted attacks" on him by Australian Olympic chiefs after he was warned to behave.

His decision follows fellow Australian Bernard Tomic making himself unavailable for Games selection last month after widespread criticism about his recent on-court attitude and behaviour.

"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," the world number 19 said in a statement.

"AOC's unfair and unjust treatment of me over the last four weeks, as well as the organisation's crystal clear position on whether they want me to be a part of the Australian Olympic team, has solidified my final decision."

AOC's chef de mission Kitty Chiller, who had voiced concerns over selecting Kyrgios and Tomic due to their behaviour acknowledged Kyrgios' decision in a brief statement on Friday, adding that "in regard to selection every athlete in contention is treated equally and fairly".