U.S. Men's Clay Court Championships
The U.S. Men's Clay Court Championship is an annual ATP Tour tennis tournament that started in 1910. It is the last remaining ATP World Tour-level tournament in the United States to be played on clay courts.
The tournament began in 1910 when the Western Lawn Tennis Association lobbied the USLTA that a National Clay Court Championship would help promote the establishment of more clay courts in the West. Clay courts were more economical to install and maintain than grass courts, and the hope was that the lower costs associated with court construction would allow for a more rapid expansion of the game. The first National Clay Court Championships were held at the Omaha Field Club with a crowd of 5,000 watching the finals. Participation and play on clay grew as a result of the event and others, and in 1914 the event was moved to the Cincinnati Tennis Club. It has since been played in numerous cities, with long stints in River Forest and Indianapolis, and is today held in Houston, Texas. Between 1970 and 1989 it was part of the Grand Prix Tennis Tour as part of the Grand Prix Super Series of events.
Relocation
The event was held at the Houston Westside Tennis Club from 2001–07. On May 8, 2007, the U.S. Tennis Association announced that the River Oaks Country Club in the River Oaks neighborhood would host the tournament starting in 2008, which will keep the event in Houston for several years. Other cities that competed for the event were Atlanta, Georgia, Winston-Salem, North Carolina, and Ponte Vedra Beach, Florida. The tournament pays out US$474,000 with the winner receiving US$85,900. The River Oaks venue features a stadium with seating for 3,000. Temporary seating for 500 will be installed for the second court.In 2007, after a few years being held on the same red clay used at the French Open, the event was held on Har-Tru green clay. In 2008, the event went to a maroon color of Har-Tru clay as the River Oaks Country Club renovated their courts in 2005. After renovating their courts again in late 2008, the surface remained the same.
Past finals
Singles
holds the record for most titles.Bill Tilden and Frank Parker co-hold the record of most finals.
Doubles
| Year | Champions | Runners-up | Score |
| 1970 |  Arthur Ashe Clark Graebner |  Ilie Năstase Ion Țiriac | 2–6, 6–4, 6–4 |
| 1971 |  Željko Franulović  Jan Kodeš | Clark Graebner Erik van Dillen | 7–6, 5–7, 6–3 |
| 1972 |  Bob Hewitt Frew McMillan |  Patricio Cornejo Jaime Fillol | 6–2, 6–3 |
| 1973 |  Bob Carmichael Frew McMillan |  Manuel Orantes Ion Țiriac | 6–3, 6–4 |
| 1974 | Jimmy Connors Ilie Năstase |  Jürgen Fassbender Hans-Jürgen Pohmann | 6–7, 6–3, 6–4 |
| 1975 | Juan Gisbert Manuel Orantes |  Wojciech Fibak Hans-Jürgen Pohmann | 7–5, 6–0 |
| 1976 | Brian Gottfried  Raúl Ramírez | Fred McNair Sherwood Stewart | 6–2, 6–2 |
| 1977 | Patricio Cornejo Jaime Fillol | Dick Crealy Cliff Letcher | 6–7, 6–4, 6–3 |
| 1978 | Gene Mayer Hank Pfister | Jeff Borowiak  Chris Lewis | 6–3, 6–1 |
| 1979 | Gene Mayer John McEnroe | Jan Kodeš Tomáš Šmíd | 6–4, 7–6 |
| 1980 | Kevin Curren Steve Denton | Wojciech Fibak Ivan Lendl | 3–6, 7–6, 6–4 |
| 1981 | Kevin Curren Steve Denton | Raúl Ramírez Van Winitsky | 6–3, 5–7, 7–5 |
| 1982 | Sherwood Stewart Ferdi Taygan | Robbie Venter Blaine Willenborg | 6–4, 7–5 |
| 1983 | Mark Edmondson Sherwood Stewart |  Carlos Kirmayr Cássio Motta | 6–3, 6–2 |
| 1984 | Ken Flach Robert Seguso |  Heinz Günthardt  Balázs Taróczy | 7–6, 7–5 |
| 1985 | Ken Flach Robert Seguso |  Pavel Složil Kim Warwick | 6–4, 6–4 |
| 1986 |  Andrés Gómez Hans Gildemeister | John Fitzgerald Sherwood Stewart | 6–4, 6–3 |
| 1987 | Laurie Warder Blaine Willenborg |  Joakim Nyström Mats Wilander | 6–0, 6–3 |
| 1988 | Pieter Aldrich Danie Visser | Jorge Lozano Todd Witsken | 7–6, 6–3 |
| 1989 | Mikael Pernfors Tobias Svantesson | Agustín Moreno  Jaime Yzaga | 6–4, 4–6, 7–5 |
| 1990 | Scott Davis David Pate | Jim Grabb Leonardo Lavalle | 6–2, 6–3 |
| 1991 | Rick Leach Jim Pugh | Bret Garnett Greg Van Emburgh | 6–3, 2–6, 6–3 |
| 1992 | Steve DeVries David Macpherson | Bret Garnett Jared Palmer | 6–4, 7–6 |
| 1993 | Rikard Bergh Trevor Kronemann |  Javier Frana Leonardo Lavalle | 6–1, 6–2 |
| 1994 | Todd Woodbridge Mark Woodforde | Jared Palmer Richey Reneberg | 6–2, 3–6, 6–3 |
| 1995 | Mark Woodforde Todd Woodbridge | Alex O'Brien Sandon Stolle | 6–2, 6–4 |
| 1996 | Pat Cash Patrick Rafter | Ken Flach David Wheaton | 6–2, 6–3 |
| 1997 |  Mark Merklein Vince Spadea | Alex O'Brien Jeff Salzenstein | 6–4, 4–6, 6–4 |
| 1998 |  Grant Stafford  Kevin Ullyett | Michael Tebbutt Mikael Tillström | 4–6, 6–4, 7–5 |
| 1999 | Jim Courier Todd Woodbridge | Bob Bryan Mike Bryan | 7–6, 6–4 |
| 2000 |  Leander Paes  Jan Siemerink | Justin Gimelstob  Sébastien Lareau | 6–3, 6–4 |
| 2001 | Mahesh Bhupathi Leander Paes | Kevin Kim Jim Thomas | 7–6, 6–2 |
| 2002 | Mardy Fish Andy Roddick | Jan-Michael Gambill Graydon Oliver | 6–4, 6–4 |
| 2003 | Mark Knowles Daniel Nestor | Jan-Michael Gambill Graydon Oliver | 6–4, 6–3 |
| 2004 | Richey Reneberg Christo van Rensburg | Brian MacPhie David Witt | 2–6, 6–3, 6–2 |
| 2005 | Mark Knowles Daniel Nestor | Martín García Luis Horna | 6–3, 6–4 |
| 2006 | Michael Kohlmann Alexander Waske |  Julian Knowle Jürgen Melzer | 5–7, 6–4, 10–5 |
| 2007 | Bob Bryan Mike Bryan | Mark Knowles Daniel Nestor | 7–6, 6–4 |
| 2008 |  Ernests Gulbis Rainer Schüttler |  Pablo Cuevas Marcel Granollers | 7–5, 7–6 |
| 2009 | Bob Bryan Mike Bryan | Jesse Levine Ryan Sweeting | 6–1, 6–2 |
| 2010 | Bob Bryan Mike Bryan | Stephen Huss Wesley Moodie | 6–3, 7–5 |
| 2011 | Bob Bryan Mike Bryan | John Isner Sam Querrey | 6–7, 6–2, |
| 2012 | James Blake Sam Querrey |  Treat Conrad Huey  Dominic Inglot | 7–6, 6–4 |
| 2013 | Jamie Murray John Peers | Bob Bryan Mike Bryan | 1–6, 7–6, |
| 2014 | Bob Bryan Mike Bryan | David Marrero Fernando Verdasco | 4–6, 6–4, |
| 2015 |  Ričardas Berankis  Teymuraz Gabashvili | Treat Huey Scott Lipsky | 6–4, 6–4 |
| 2016 | Bob Bryan Mike Bryan |  Víctor Estrella Burgos Santiago González | 4–6, 6–3, |
| 2017 |  Julio Peralta Horacio Zeballos |  Dustin Brown Frances Tiafoe | 4–6, 7–5, |
| 2018 |  Max Mirnyi Philipp Oswald | Andre Begemann  Antonio Šančić | 6–7, 6–4, |
| 2019 | Santiago González  Aisam-ul-Haq Qureshi | Ken Skupski Neal Skupski | 3–6, 6–4, |
Records
Men's singles
Source: The Tennisbase included- Most titles: Bill Tilden,
- Most consecutive titles: Bill Tilden,
- Most finals: Bill Tilden,
- Most consecutive finals: Bill Tilden,
- Most matches played: Tut Bartzen,
- Most matches won: Frank Parker,
- Most consecutive match wins: Bill Tilden,
- Most editions played: Seymour Greenberg and Grant Golden,
- Best Match winning %: Bill Tilden
- Longest final: Seymour Greenberg v Harris Everett, result: 5–7, 7–5, 7–9, 7–5,
- Shortest final: Magnus Norman v Guillermo Cañas, result: 6–0, 6–3,
- Title with the least games lost: Andre Agassi,,
- Oldest champion: Samuel Hardy, 40y 7m and 18d,
- Youngest champion: Frank Parker, 17y 5m and 3d,