New Delhi: Sunitha Rao quelled the challenge of American Gail Brodsky in straight sets to storm into the singles quarter finals of the $50,000 ITF women tennis tournament in Boston.

The fifth seeded Indian overcame Brodsky 6-3, 7-5 in the second round of the hard court event.

Sunitha next faces second seed Canadian Stephanie Dubois, who booked a last eight berth after her Russian opponent Regina Kulikova conceded the match after losing the first set 4-6.

Sunitha has already crashed out of the doubles event of the tournament after losing in the first round.