Western Australia wicketkeeper Luke Ronchi has scored the fastest century in the history of domestic one-day cricket in Australia.

Ronchi reached 101 not out off 56 balls, breaking teammate Adam Voges' record by six balls, during the game against NSW at the WACA Ground.

Ronchi, opening the innings with Justin Langer, had never before scored a century in one-day cricket, with a previous best of 78.

After reaching 50 in 27 balls, the fourth fastest in domestic one day history, Ronchi continued to hammer the Blues attack to reach 95 off 55 balls.

Needing five runs off six balls to break Voges' record, he clouted his fifth six, off the bowling of Nathan Hauritz to break the record.

Voges previous mark had came two seasons ago at North Sydney Oval, against the same opposition.

Ronchi's century took 75 minutes and included 11 fours and five sixes.

It also smashed the previous fastest domestic century at the WACA, which was achieved by Langer against Queensland in 2003/2004.

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