World's top women tennis players battle it out in Dubai
Anna Chakvetadze of Russia returns the ball to Daniela Hantuchova of Slovakia during their WTA Dubai Open tennis match in the Gulf emirate on February 15, 2011. Chakvetadze won 6-1, 6-3. (AFP/Getty Images)
From underwater mining to luxury yachts, Mohammed Al Barwani has interests in a staggering range of industries. The chairman of MB Holding explains how he built the firm from scratch to become a billion-dollar player.