LONDON  - Tunisia's Oussama Mellouli survived a late surge from his rivals to win the men's 10km swimming marathon on Friday and become the first person to hold Olympic titles in both pool and open water races. Mellouli broke clear at the start of the last lap and clung on in the final stages to hold off Germany's Thomas Lurz and Richard Weinberger of Canada. The Tunisian, who also came third in the 1500m freestyle on Sunday, finished 3.4sec ahead of Lurz in a superb time of 1hr 49min 55.1sec at a sun-soaked Hyde Park.