1951 U.S. National Championships – Men's singles

Frank Sedgman defeated Vic Seixas 6–4, 6–1, 6–1 in the final to win the men's singles tennis title at the 1951 U.S. National Championships.

Seeds
The tournament used two lists of eight players for seeding the men's singles event; one for U.S. players and one for foreign players. Frank Sedgman is the champion; others show the round in which they were eliminated.


 * U.S.


 * 1) 🇺🇸 Dick Savitt (semifinals)
 * 2) 🇺🇸 Arthur Larsen (semifinals)
 * 3) 🇺🇸 Tony Trabert (quarterfinals)
 * 4) 🇺🇸 Herbie Flam (quarterfinals)
 * 5) 🇺🇸 Bill Talbert (fourth round)
 * 6) 🇺🇸 Gardnar Mulloy (quarterfinals)
 * 7) 🇺🇸 Vic Seixas (finalist)
 * 8) 🇺🇸 J.E. Patty (quarterfinals)


 * Foreign


 * 1) 🇦🇺 Frank Sedgman (champion)
 * 2) 🇦🇺 Ken McGregor (fourth round)
 * 3) 🇦🇺 Mervyn Rose (fourth round)
 * 4) 🇬🇧 Tony Mottram (third round)
 * 5) 🇫🇷 Paul Rémy (second round)
 * 6) 🇦🇺 Don Candy (third round)
 * 7) 🇯🇵 Jiro Kumamaru (first round)
 * 8)  Sydney Levy (third round)

Key

 * Q = Qualifier
 * WC = Wild card
 * LL = Lucky loser
 * r = Retired