2014 US Open – Men's singles

Marin Čilić defeated Kei Nishikori in the final, 6–3, 6–3, 6–3 to win the men's singles tennis title at the 2014 US Open. It was his first major title. Čilić was the second Croatian to win a men's singles major, after his coach Goran Ivanišević at the 2001 Wimbledon Championships.

Rafael Nadal was the reigning champion, but withdrew before the tournament due to a right wrist injury.

Nishikori became the first Japanese in the Open Era to reach a major semifinal and final, and the first since Jiro Sato at the 1933 French Championships.

The finalists defeated Roger Federer and Novak Djokovic in their respective semifinals, guaranteeing a new major champion. This was the first major final with a guaranteed first-time champion since the 2008 Australian Open and the first major final with two first-time finalists since the 2005 French Open. Nishikori and Čilić were the two lowest-ranked seeds to reach the US Open final since 2002. Between the 2004 Wimbledon Championships and 2020 Australian Open, this was the only major final not to feature a member of the Big Four.

This marked the first US Open appearance of future champion Dominic Thiem; he lost in the fourth round to Tomáš Berdych.