ABU DHABI, Jan 20 (Reuters) - Jamie Donaldson achieved the biggest victory of his career after edging out fellow Briton Justin Rose and Dane Thorbjorn Olesen on a thrilling final day at the $2.7 million Abu Dhabi Championship on Sunday. Donaldson squeezed five birdies in a closing four-under-par 68 to finish 14-under on 274, one ahead of overnight leader Rose (71) and Olesen (69). The Welshman almost let in his title rivals when he bogeyed the last hole after missing from five feet. ... More...