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By Maria Golovnina and Mehreen Zahra-Malik ISLAMABAD (Reuters) - Pakistani Prime Minister Nawaz Sharif came under new pressure to resign on Friday as thousands massed outside his residence following more than two weeks of demonstrations against his rule. Protesters led by former cricketer Imran Khan and cleric Tahir ul-Qad have have been camped outside parliament for more than two weeks. Pakistan has been ruled by the military for more than half its history, and the army stepped in this week to try to defuse the unrest.
Wimbledon champion Petra Kvitova became the fifth top 10 seed to exit the US Open in the first week when she was knocked out by Serbian world number 145 Aleksandra Krunic on Saturday. Third seeded Kvitova lost the third round tie 6-4, 6-4 to the pint-sized 21-year-old from Belgrade, who came through qualifying and had never won a match at a major before this year's event. Kvitova joins second seed Simona Halep, fourth-seeded Agnieszka Radwanska, Angelique Kerber, the sixth seed, and eighth-seeded Ana Ivanovic in failing to make the fourth round. The 24-year-old Kvitova dropped serve five times and committed 34 unforced errors against the 5ft 4in (1.63m) Krunic who divides her time between the pro tour and studying for a university economics degree.