Which Swiss player won five straight US Open men's singles titles from 2004 to 2008?

Roger Federer won five straight US Open men's singles titles from 2004 through 2008.

Federer's streak began with a 2004 victory over Lleyton Hewitt and continued through wins against Andre Agassi in 2005, Andy Roddick in 2006, Novak Djokovic in 2007, and Andy Murray in 2008. He became the only men's singles player in the Open Era to win the tournament five consecutive times.

The achievement is especially notable because Federer won the titles against several different generations of elite players. His 2008 victory over Murray was also his fifth straight championship match win in New York. Across the tournament, he compiled 40 consecutive US Open match victories from 2004 through 2009.

A common mix-up is confusing Federer's US Open streak with his Wimbledon streak. He also won five consecutive Wimbledon titles, but that run covered 2003 through 2007. At the US Open, his five-title sequence ran from 2004 to 2008 and ended when Juan Martín del Potro beat him in the 2009 final.