The report notes that half the women in the Arab world are illiterate, compared to one-third of men.

ECONOMIST: Arab women are suffering, says a UN report

In the women's draw, world No. 2 Maria Sharapova and third-ranked Victoria Azarenka reached the last 16 despite struggling with their serves.

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World bronze medallist Jenny Meadows produced Britain's best performance with third place in the women's 800m.

BBC: Stunning Jeter run upstages Bolt