<Tr> <Td> ← 2013 </Td> <Td> US Open </Td> <Td> 2015 → </Td> </Tr> <P> Rafael Nadal was the defending champion, but he withdrew before the tournament began because of a right wrist injury . </P> <P> Marin Čilić claimed his first grand slam title, defeating Kei Nishikori, also playing in his first major final . </P> <P> Both players defeated Novak Djokovic and Roger Federer in their respective semi-finals to guarantee a new champion, the first Grand Slam final with a guaranteed new champion since the 2008 Australian Open (when Djokovic defeated Jo - Wilfried Tsonga), and the first Grand Slam with two first - time Slam finalists since the 2005 French Open (where Nadal defeated Mariano Puerta). It was also the first time since the 2005 Australian Open final (where Marat Safin defeated Lleyton Hewitt) that neither Djokovic, Federer, nor Nadal has featured in a Grand Slam final, and the first time since 2003 (when Juan Carlos Ferrero, Federer, and Andy Roddick all won their first major titles) that multiple first - time Grand Slam winners have been crowned in a single season due to Stan Wawrinka's win at the 2014 Australian Open . Nishikori and Čilić were also the two lowest - ranked seeds to reach the US Open final since Pete Sampras won the title in 2002 as 17th seed . </P>

Who won the men's singles title of the us open tennis grand slam 2014