Second seed Sania Mirza [ Images ] overcame a second-set hiccup to advance into the quarter-final of the US $175,000 Japan [ Images ] Open Tier III WTA event in Tokyo on Wednesday.

The Indian ace beat Australia's [ Images ] Casey Dell'Acqua 6-4, 3-6, 6-4 in the second round.

On Tuesday, Sania had also advanced to the quarter-final of doubles, as she and her American partner Christina Fusano notched a 6-3, 6-2 win over Polish-Romanian pair of Ursula Radwansaka and Agnes Szatmari.

Sania will face the winner of the match between Flavia Pennetta [ Images ] and Abigail Spears in the last eight.