1963 U.S. National Championships – Men's singles

Rafael Osuna defeated Frank Froehling 7–5, 6–4, 6–2 in the final to win the men's singles tennis title at the 1963 U.S. National Championships.

Seeds
The seeded players are listed below. Rafael Osuna is the champion; others show the round in which they were eliminated.


 * 1) 🇺🇸 Chuck McKinley (semifinals)
 * 2) 🇦🇺 Roy Emerson (fourth round)
 * 3) 🇺🇸 Dennis Ralston (quarterfinals)
 * 4) 🇲🇽 Rafael Osuna (champion)
 * 5) 🇦🇺 Ken Fletcher (third round)
 * 6) 🇬🇧 Bobby Wilson (quarterfinals)
 * 7) 🇺🇸 Eugene Scott (third round)
 * 8) 🇺🇸 Ham Richardson (third round)

Key

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