(Reuters) - World number one Ash Barty looked in impressive form as she stormed into the quarter-finals of the Western & Southern Open on Thursday, the Australian happy to play as much as possible on an unusually long stint away from home.

Barty continued her preparations for the U.S. Open by rattling off the first 10 games on her way to crushing former world number one Victoria Azarenka 6-0 6-2 in little more than an hour.