<p>Sania Mirza dug deep into her reserves to overcome a fighting Anne Keothavong 6-4 7-5 to progress to the singles quarter-finals of the USD 220,000 Pattaya Open, here today.<br /><br /></p>.<p>The unseeded Indian, ranked 111, tamed the giant-killing British rival in a hard-fought second round match after one hour and 40 minutes struggle.<br /><br />Keothavong, ranked 88, had shocked second seed and world number 16 Dominika Cibulkova of Slovakia in the opening round.<br /><br />Sania has also reached the doubles quarter-finals with Australian partner Anastasia Rodionova.<br /><br />The top-seeded pair routed a hapless French pair of Iryna Bremond and Caroline 6-0 6-2 in the first round.<br /><br />They are now up against local pair of Varatchaya and Varunya Wongteanchai in the last-eight stage match.<br /><br />In the singles match today, Sania served extremely well in the second set and put behind an early break to stage a brilliant comeback.<br /><br />She saved a crucial breakpoint in the 11th game and then broke Keothavong for the second time to claim a well-deserved win.<br /><br />She will now face either Japanese Kimik Date-Krumm or Chinese Taipei qualifier Su-Wei Hsieh in the quarter-finals.<br /><br />Sania had lost in the qualifiers at this event.</p>
<p>Sania Mirza dug deep into her reserves to overcome a fighting Anne Keothavong 6-4 7-5 to progress to the singles quarter-finals of the USD 220,000 Pattaya Open, here today.<br /><br /></p>.<p>The unseeded Indian, ranked 111, tamed the giant-killing British rival in a hard-fought second round match after one hour and 40 minutes struggle.<br /><br />Keothavong, ranked 88, had shocked second seed and world number 16 Dominika Cibulkova of Slovakia in the opening round.<br /><br />Sania has also reached the doubles quarter-finals with Australian partner Anastasia Rodionova.<br /><br />The top-seeded pair routed a hapless French pair of Iryna Bremond and Caroline 6-0 6-2 in the first round.<br /><br />They are now up against local pair of Varatchaya and Varunya Wongteanchai in the last-eight stage match.<br /><br />In the singles match today, Sania served extremely well in the second set and put behind an early break to stage a brilliant comeback.<br /><br />She saved a crucial breakpoint in the 11th game and then broke Keothavong for the second time to claim a well-deserved win.<br /><br />She will now face either Japanese Kimik Date-Krumm or Chinese Taipei qualifier Su-Wei Hsieh in the quarter-finals.<br /><br />Sania had lost in the qualifiers at this event.</p>