2013 U.S. Men's Clay Court Championships

The 2013 U.S. Men's Clay Court Championships was a men's tennis tournament played on outdoor clay courts. It was part of the 2013 ATP World Tour. It was the 45th edition of the U.S. Men's Clay Court Championships, and an ATP World Tour 250 event. It took place at River Oaks Country Club in Houston, Texas, United States, from April 8 through April 14, 2013. Fifth-seeded John Isner won the singles title.

Seeds

 * Rankings and seedings are as of April 1, 2013.

Other entrants
The following players received wildcards into the main draw:
 * 🇺🇸 Steve Johnson
 * 🇺🇸 Jack Sock
 * 🇺🇸 Rhyne Williams

The following players received entry via the qualifying draw:
 * 🇦🇷 Facundo Argüello
 * 🇺🇸 Robby Ginepri
 * 🇺🇸 Bradley Klahn
 * 🇦🇹 Gerald Melzer

The following player received entry as a lucky loser:
 * Ivo Karlović

Withdrawals

 * Before the tournament
 * 🇦🇷 Carlos Berlocq
 * 🇦🇷 Leonardo Mayer
 * 🇺🇸 Sam Querrey

Seeds

 * Rankings are as of April 1, 2013.

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇺🇸 Steve Johnson / 🇺🇸 Jack Sock
 * 🇪🇸 Fernando Verdasco / 🇩🇪 Mischa Zverev

Singles

 * 🇺🇸 John Isner defeated 🇪🇸 Nicolás Almagro, 6–3, 7–5

Doubles

 * 🇬🇧 Jamie Murray / 🇦🇺 John Peers defeated 🇺🇸 Bob Bryan / 🇺🇸 Mike Bryan, 1–6, 7–6(7–3), [12–10]