Sunitha Rao quelled the challenge of American Gail Brodsky in straights sets to storm into the quarter-finals of the US $50,000 ITF women's hardcourt tennis tournament in Boston.
The fifth seeded Indian won the second round match 6-3, 7-5.
Sunitha next faces second seeded Canadian Stephanie Dubois, who booked a last eight berth when 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.