MELBOURNE - Maria Sharapova Saturday revealed how she had been taking out her frustrations on Australian boys after injury curtailed her build-up to the Australian Open.

The former winner, and last year's runner-up, goes into the season's opening Grand Slam without any competitive matches under her belt after a collarbone problem ruled her out of this month's Brisbane event. Sharapova said she is now fully recovered had resorted to practising with Australia's top junior players to find match sharpness.