Australia beat Sri Lanka by five wickets on the fourth day of the third test at Sydney Cricket Ground today to sweep the series 3-0.Scores: Australia 141-5 (R. Herath 3-47) & 432-9 dec (M. Wade 102 not out, P. Hughes 87, D. Warner 85, M. Clarke 50; Sri Lanka 278 (Dimuth Karunaratne 85, D. Chandimal 62 not out, M. Jayawardene 60; M. Johnson 3-34, J. Bird 3-76) & 294.