New York, 13-09-09 World number one and five-time defending champion Roger Federer advanced to the US Open men's final on Sunday by defeating Serbian fourth seed Novak Djokovic 7-6 (7/3), 7-5, 7-5. The Swiss superstar stretched his US Open unbeaten streak to 41 matches and will play for his 16th Grand Slam title and a 1.6 million-dollar top prize on Monday against Argentine sixth seed Juan Martin del Potro. Photo Ray Giubilo