Sania Mirza finally runs out of steam
	Bangalore: In sport, the only certainties are the uncertainties. In tennis, the sheer suddenness of momentum shifts and steep dips in mental fortitude are hard to comprehend, let alone digest. After playing a scorcher of a tie-break in the first set, Sania Mirza lost no time in surrendering the first four games of the second set, which severely affected her momentum and return of serves. Yaroslava Shvedova relied on her serve to beat the second seed 6-7(2), 6-4, 6-4, in the quarterfinals of the Sony Ericsson International WTA tennis event, at the KSLTA Stadium, on Friday. "She served incredibly. The second serves were almost going over my head. I don't think I played a bad match today, she just played some amazing tennis," said Sania. Start of the slide As she admitted, Sania did nothing fundamentally wrong, but still found herself losing four games on the trot. One-sided tie-breaks do not break the losers as much as one-sided sets do. Sania had the psychological edge after the first set, but only slightly so. The crucial first game of the second set went against her, which started the slide. She salvaged something from the ravaged second set, breaking back in the eighth game and turning the score from a potentially disastrous 0-6 or a 1-6, to a decent 4-6. The 19-year old Shvedova showed a lot more aggression on Friday, than what she displayed in her earlier rounds. She matched Sania's every shot, exploiting every bit of court vacancy. Sania's break back in the second set increased her confidence, with some of the 20-year-old's backhand winners leaving the Russian lead-footed. As most players do against Sania, Shvedova relentlessly assaulted her backhand. When it didn't work too well in the first set, she stuck to a lot less of angular hitting, choosing the middle path. Up 2-0 in the third, Sania was broken back, and broken again in the fifth game. The frustration was seeping in, and after the unforced errors, squashed insects and luckless moments near the net, she succumbed to Shvedova's second match point. Obziler through Earlier, Israeli Tzipora Obziler beat Hungarian Melinda Czink 6-4, 7-6(3), in the quarterfinals. The 33-year-old will break into the top-100 for the first time thanks to this win. In the doubles quarterfinals, the Indo-Italian combine of Sania Mirza and Mara Santangelo defeated the Uberoi sisters Shikha and Neha 6-3, 6-1. The results: Singles: Quarterfinals: Yaroslava Shvedova (Rus) bt Sania Mirza (Ind) 6-7(2), 6-4, 6-4; Tzipora Obziler (Isr) bt Melinda Czink (Hun) 6-4, 7-6(3); Mara Santangelo (Ita) bt Yurika Sema (Jpn) 6-1, 6-4; Olga Savchuk (Ukr) bt Jelena Kostanic-Tosic (Cro) 6-3, 6-4. Doubles: Semifinals: Yung-Jan Chan (Tpe) & ChiaJung Chuang (Tpe) bt Jarmila Gajdosova (Svk) & Christina Horiatoppoulous (Aus) 6-3, 6-2. Quarterfinals: Sania Mirza (Ind) & Mara Santangelo (Ita) bt Shikha Uberoi (Ind) & Neha Uberoi (U.S.) 6-3, 6-1.