By Liana B. Baker RIO DE JANEIRO (Reuters) - Britain's Justin Rose and Swede Henrik Stenson were battling it out for golf's first Olympic gold medal in the modern era with Rose fighting to protect a one-stroke lead in the final round. Stenson briefly joined him at the top of the leaderboard after starting his round with two birdies but the Briton responded with two birdies of his own to move to 14 under par. Several players are in contention for the bronze medal, looking to unseat Belgium's Thomas Pieters who occupies that position.
