Kyrgios, Tomic Olympics brawl

Tennis bad boy Nick Kyrgios is a doubtful starter to represent Australia at the Rio Olympics Dennis Grombkowski/Getty Images

Bernard Tomic may not be the last high profile withdrawal from the Australian Olympic team with Chef de Mission Kitty Chiller now focusing on fellow tennis brat Nick Kyrgios.

Tomic withdrew from the Rio games this week before officials had a chance to announce their decision on whether they would select him to represent Australia.

But just days after Chiller put the pair on notice due to their poor behavioural record, Kyrgios challenged Chiller on social media.

Kyrgios referred to Australia's Olympic team boss as "that Kitty Chiller", and goaded selectors by daring them to overlook him at a recent post-match press conference.

Chiller described Kyrgios' response as "ill-advised" and said it proved he did not know what it meant to represent Australia.

"We have had nothing official except for some ill-advised, shall I say, comments about me and what it means to be an Olympian," she said.

"I think some of Nick's comments in social media have shown that maybe he doesn't understand what it means to be an Australian Olympian.

"It is not just about winning on the court, it's about how you go about it." Chiller revealed that her tough stance against the pair had not changed and it is becoming increasingly likely that Kyrgios will also be watching the Olympics rather than competing.

"Nick has just come off a suspended sentence from the International Tennis Federation.

"Any athlete that has just had disciplinary action by an international federation clearly is on watch."

Tomic's withdrawal saved Australia's Olympic officials from making a call on the matter but he may have beaten them to the punch.

Chiller described his behaviour at a recent tournament in Madrid where he deliberately gave up a match point and said he didn't care because he was 23 and worth more $10 million as "appalling".

Tomic described his withdrawal from the Olympics as what is best for his career.

"It's his choice. We only want people in our team who want to be there and prepared to abide by what that team means," Chiller said.

"Thousands of Australians would give anything, devote their whole lives to be an Olympics and adhere to what that means.

"If someone doesn't see the value in that then that's their loss."

Tomic has since confirmed to play at an ATP World Tour tournament in Mexico while the games are on.

"With a heavy sense of regret, I have made the difficult decision to not play with the Australian tennis team as they pursue an Olympic medal in Rio," Tomic said in a statement.

"I have always proudly represented my country in Davis Cup and given my all when wearing the green and gold.

"But on the basis of my extremely busy playing schedule and my own personal circumstances, I am regrettably unable to commit to this year's tournament."