Maria Sharapova is convinced of being fit in support of the Australian frank despite torment from an ankle injury.STORY HIGHLIGHTSMaria Sharapova has pulled improbable of Januarys Brisbane International tournamentThree-time key winner Sharapova is agony from an ankle injuryThe Russian expects to be present fit pro the Australian wide open which she won happening 2008 Three-time key winner Maria Sharapova has been required to withdraw from Januarys Brisbane International event as of an ankle injury.The 24-year-old Russian suffered the injury dressed in Septembers Pan tranquil approachable, and she has disastrous to shake inedible the unruly.Sharapova released a statement saying: I was really looking to the fore to opening my 2012 season by the side of the Brisbane International, which has a fantastic reputation when a exalted and welcoming event.Venus could fail to spot Australian OpenUnfortunately my ankle is not 100% and I wont happen able to appoint it this yearMaria SharapovaUnfortunately my ankle is not 100% and I wont happen able to appoint it this day.However, Sharapova still believes she command be real fit instead of the Australian direct, which gets underway trendy Melbourne on January 16.