Wallabies hooker Tatafu Polota-Nau has been playing through as good as a broken arm, coach Michael Cheika says, and wont play another Test until its fully healed.Polota-Nau was the surprise high-profile casualty from Cheikas 30-man squad on Thursday for the Rugby Championship clashes against South Africa and Argentina.The 31-year-old fractured his right arm for the second time while playing for the NSW Waratahs in March.Despite playing through significant pain in the June Test window and the early part of the Rugby Championship, hes still not 100 per cent, and after discussing the situation with Polota-Nau, Cheika said the best course of action was for him to stop.Hes as good as playing with a broken arm. His arm hasnt mended properly, Cheika told reporters on Thursday.Hes got the plate in there and hes been really pushing hard and its a real credit to him because its been tough for him.But thats enough now.Polota-Naus a player that we want. What hes adding in games has been really vital for us and hes a player we want in top condition going forward.His decision to either have a rest or operate or whatever it might be, well make in the next couple of weeks and decide then what happens for him for the rest of the season.Polota-Naus understudy at the Waratahs, Tolu Latu, has joined the squad as his replacement and is one of two uncapped players, along with winger Sefa Naivalu, in line to become Australias 10th Test debutant this year.Cheika said he would do everything he could to ensure Polota-Nau returned to Super Rugby as soon as possible, amid reports hes agreed to a big-money deal with English Premiership club Bristol.Veteran winger Drew Mitchell, lock Will Skelton and back-rower Ben McCalman have been left out of the side due to a lack of recent match fitness.Mitchell will return to his French club Toulon, leaving Will Genia as the last remaining European-based Wallaby.The Fiji-born Naivalu finally became eligible to represent Australia on Monday and Cheika said he was excited to see what he could offer the team.Weve been going through a bit of a changeover in a few positions and the idea is that were going to build more depth, he said.Young prop Allan Alaalatoa is also in the mix after overcoming the medial ligament strain he suffered in Brisbane, although Cheika admitted it was touch and go whether he would be right to take on the Springboks in Pretoria on October 1.The Wallabies face Argentina at Londons Twickenham Stadium a week later.Wallabies: Allan Alaalatoa, Rory Arnold, Adam Coleman, Quade Cooper, Kane Douglas, Scott Fardy, Israel Folau, Bernard Foley, Nick Frisby, Will Genia, James Hanson, Dane Haylett-Petty, Reece Hodge, Michael Hooper, Sekope Kepu, Samu Kerevi, Tevita Kuridrani, Tolu Latu, Sean McMahon, Stephen Moore (c), Luke Morahan, Dean Mumm, Sefania Naivalu, Nick Phipps, Tom Robertson, Rob Simmons, Scott Sio, James Slipper, Henry Speight, Lopeti Timani. 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Swimmer Ryan Lochte has been suspended 10 months by the United States Olympic Committee and USA Swimming for his involvement in a highly publicized, late-night incident at a gas station during the Rio Games last month, according to multiple reports.?The 12-time Olympic medalist said a stranger pointed a gun at him and demanded money to let him leave the gas station. Lochte had initially called it a robbery; Brazilian police said he and three other swimmers (Gunnar Bentz, Jack Conger and Jimmy Feigen) vandalized a bathroom at the station and were confronted by armed security guards.The incident -- and the swimmers ever-changing descriptions of it -- became a major storyline of the Rio Games.It shocked and angered Brazilians, who said it cast an unearned negative shadow on Rio and the Olympics at a time when the country was eager to prove it could host the Games safely. It dominated headlines, overshadowing the accomplishments of athletes who trained for years just to get there. And it was an embarrassmennt for the U.ddddddddddddS. Olympic team, which dominated the medal count.Last month, the USOC echoed Olympic officials in publicly expressing disappointment and pledging to further examine the matter.We apologize to our hosts in Rio and the people of Brazil for this distracting ordeal in the midst of what should rightly be a celebration of excellence, the USOC said.Lochte reportedly will miss the 2017 world championships as part of the suspension, which was first reported by TMZ Sports.?Since returning to the United States, he has lost all four of his endorsements. Three companies -- Speedo, Gentle Hair Removal and Airweave -- terminated their deals with the swimmer, while Ralph Lauren said it wouldnt renew its deal that ran through the 2016 Olympics.Lochte will appear on ABCs Dancing with the Stars this season.?Information from The Associated Press was used in this report. ' ' '