Jankovic won with steady play from the baseline, while the big-swinging Muguruza committed 29 unforced errors.
It has an easy, unforced rhythm, yet it needs more plot, more complication, more conflict.
Jankovic admitted she had made too many unforced errors after a good start to the match.
"This loss hurts, particularly playing for your country, " said Massu, who committed 51 unforced errors.
The music of San Francisco's Citay brims with a casual, unforced effervescence that belies meticulous arranging.
Henin-Hardenne had 16 winners and 18 unforced errors, while Kuznetsova committed 29 unforced errors with 10 winners.
He improved to 55-1 at Roland Garros despite committing 40 unforced errors and facing 11 break points.
But the Italian let himself down just as much with some sloppy shots, making 59 unforced errors.
Kuerten hit 20 winners to Ivanisevic's 11 and made just 15 unforced errors to his opponent's 24.
She won a total of 96 points to Kleybanova's 90, and had only two fewer unforced errors.
Sharapova had 57 unforced errors, including 13 double-faults, and overcame three set points in the second set.
The first may be the easiest to overcome: his government is still prone to making unforced errors.
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Leeds fought back valiantly and enjoyed some sustained pressure but unforced errors and stout Sale defending denied them.
England started poorly, a series of unforced errors handing the Wallabies a 6-0 lead in as many minutes.
Romney remains the most likely nominee, especially after Santorum may have blown his own momentum with unforced errors.
But 16-year-old Robson was out of sorts in the final on Rod Laver Arena, making 31 unforced errors.
Sharapova was particularly inconsistent, hitting 42 winners but also producing 44 unforced errors.
"I lost my serve at the beginning of the second set and he made fewer unforced errors, " he explained.
Williams, who made 44 unforced errors, admitted she found it tough going against the world number 90 in her victory.
In a match dominated by a series of seemingly interminable rallies, 48 of them ended in unforced errors by Williams.
The second seed committed 40 unforced errors to just 10 for Hingis and she struggled with her usually reliable serve.
The 28-year-old made just 13 unforced errors to her opponent's 20, and made 28 winners to Olympic champion Dementieva's 20.
But, in contrast to last week, the 21-year-old made numerous unforced errors and hit as many double faults as aces.
Although George Carmont gave Wigan an early lead, they committed a string of unforced errors, gifting possession and position to Warrington.
The 22-year-old made a sluggish start and a misfiring second serve combined with several unforced errors saw her quickly fall 0-3 behind.
Sharapova committed 66 unforced errors to lose 7-6 3-6 6-4 in a match that lasted a marathon three hours and 21 minutes.
The Serbian made 40 unforced errors and served four double-faults as she lost to Bondarenko for the first time in 10 meetings.
Meanwhile, Na was unconvincing as she made 39 unforced errors in a straight sets defeat of Spanish teenager Garbine Muguruza (7-6, 6-2).
And he made 78 unforced errors as he slipped to defeat against Juan Carlos Ferrero in the semi-finals of the French Open.
However, three unforced errors in the very next game allowed Djokovic to break straight back and the Serb served out the set.
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