Frustrated rugby star Quade Cooper's future in the code appears on shaky ground following more shots at the Wallabies' coach, Robbie Deans, and the Australian Rugby Union.

Cooper's frustrations have continued to boil over with a second thinly veiled attack in four days on Deans' tactics plus suggestions he wants to join good mate Sonny Bill Williams in the National Rugby League contest.

Sidelined by a knee injury, the 38-test playmaker posted a string of cutting remarks on his Twitter account at the weekend at a delicate time in contract negotiations with the Australian Rugby Union.

Fresh from saying the Wallabies would continue to lose fans and Bledisloe Cup tests if they played to a boring, conservative style, Cooper tweeted about problems behind the scenes, before removing two posts.


"Might thoughts on rugby now is who's playing ... my thoughts on other codes how the f - do we get tickets !!" one deleted post read.

"I love rugby but there's s - t going on behind and above the players the effects the whole organisation! Happens at the reds few years back," said another, referring to problems at the Queensland Rugby Union before an administrative and coaching cleanout that resulted in a reversal of fortunes.

When a follower told Cooper he should be allowed to play in the exciting manner he is renowned for, the Queensland Reds five-eighth responded with a shot at Deans' conservative tactics. "I am allowed from February to May sir," Cooper wrote, in reference to his Super Rugby play under Reds coach Ewen McKenzie.

Another follower asked him if he would play for the South Sydney Rabbitohs in the 2013 NRL competition, to which he replied: "No but I want to play with @SonnyBWilliams."

Cooper revealed he would spend some time in Japan in the coming weeks with close mate Williams, who is set to line up for the Sydney Roosters next season.

His series of criticisms come after Deans admitted he was close to dragging his No 10 in the 23-19 win over Argentina this month.

Cooper's three-year contract with the Reds is yet to be ratified as his ARU component hasn't been finalised, leading to concerns he will be lost to rugby.

His manager, Khoder Nasser, is in lengthy negotiations with the Australian union but Cooper said he wasn't stressed about the situation.

"There's no worries from my side," he said last week. "That's all Khoder's job to look after that.

"I've agreed to stay with the Reds for three years and I love playing with the Reds.

"If [there's no ARU agreement] then I'll just concentrate on getting my body right for the next time I have to play," he said.

Cooper attended the Queensland club grand final yesterday but would not comment further about his latest concerns.