The Swiss star, who is closing on Pete Sampras's record of 286 weeks at No. 1, needed to save a set-point at 6-5 in the tie-break.
Despite failing to close out the set at 5-3, China's most-accomplished tennis player clinched her fourth set-point opportunity on Azarenka's serve, courtesy of a double fault.
Despite failing to close out the set at 5-3, China's most-accomplished tennis player clinched her fourth set-point opportunity on Ms. Azarenka's serve, courtesy of a double fault.
The 25-year-old had a set-point at 5-3 in the first set but then suffered a total collapse, winning only two more games as her Austrian opponent raced to a 7-5 6-2 victory.
The Russian raced out to a 4-1 lead in the breaker, but the world number 21 was not to be denied as she saved a set-point before closing out the match in just under an hour and a half.
"It's always a balancing act between how much mileage you are going to cover from a reliability issue and from a set-up point of view working with the new car, " he said.
Lopez-Obrador also set out a 20-point plan that will include addressing immigration that will heighten conflict, price gouging for services like electricity and cell phone use, and media monopolies among other issues in the ambitious agenda.
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The defending champion double-faulted on set point in the first set and trailed 3-0 in the second set tiebreaker before he took charge of the match.
France had not had it all their own way - the Spaniards took the doubles into a fourth set having saved a match point in the third set tie-break.
Three-time defending Dubai champion Djokovic saved a set point in the second-set tiebreaker before beating Tipsarevic 6-1 7-6, while Murray saw off the fifth seed Tomas Berdych 6-3 7-5.
Nieminen actually had a point to go 2-0 up in the second set, but failed to seize the only break-point presented by Federer in the course of the match.
The government has now set out a 10-point legacy plan, which MPs will be kept up to date on.
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The PRA has also released a 10-point set of "key principles" it wanted to see incorporated into the discussions taking place between the RFU and Premier Rugby.
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He and his crew developed his car's set-up to the point that he was quicker than Lewis in qualifying -- even though he had a marginally heavier fuel load.
The sixth-seeded American -- who had not won a Masters title on the ATP Tour for four years -- fired 13 ace and did not face a single set point in a 7-5 6-4 win.
Philippoussis finally cracked when he double-faulted at 5-5 in the third set tie-break to hand Ferreira match point.
However, with Sinfield missing the extras the six-point gap set up a tense finish.
He earned a set point at 5-4 up but could not convert, dumping a weak backhand into the net.
Hs patient baseline game helped earn him the first set point at 5-4, only for Gulbis to fire a huge ace out wide.
An overhead smash into the net gave Lopez set point at 6-5 in the first-set tie-break, which he converted at the first attempt.
But the Dane returned to winning ways with 23 winners as world number 88 King produced an error-strewn display, double-faulting on set point on both occasions to hand Wozniacki victory.
Another try would have given Bath a bonus-point win, which would have set up a last-four encounter against Harlequins.
Third-seed Venus had looked a nailed-on winner until the second-set tiebreak, at which point her serve inexplicably deserted her.
The returning Vainikolo touched down in the corner from Lamb's pin-point kick to set Gloucester on their way after seven minutes.
The set point theory of well-being appears to be wrong.
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