Multiple choice general knowledge sports Whom did Roger Federer Defeat to win his first US Open Grand slam Title. Mark Phillipousis Andy Roddick Lleyton Hewitt Marat Safin Reveal answer Fill a bubble to check yourself C Correct answer Explanation Roger Federer won his first US Open title in 2004 by defeating Lleyton Hewitt 6-0, 7-6, 6-0 in the final. This was Federer's third Grand Slam title and announced his dominance on all surfaces.