Injury-prone all-rounder Shane Watson has been ruled out of Australia's one-day tour of Zimbabwe after standing on a ball and twisting his ankle at training in Brisbane on Saturday. Batsman Phillip Hughes will replace Watson for the August 25-September 6. triangular series that also involves South Africa. "His ankle is currently swollen and sore, but expected to recover with a period of rest," Australian team physiotherapist Alex Kountouris said in a statement about Watson's injury.