Horacio Zeballos and Julio Peralta celebrate their first Houston team doubles title on Sunday.

Steve Johnson captures his first ATP World Tour singles title in Houston.

Steve Johnson will try to win his first ATP World Tour title on clay.

Steve Johnson gains his second career win against Jack Sock in their FedEx ATP Head2Head series.

Thomaz Bellucci will try to win his first Houston title on Sunday.

The Bryan brothers have been racking up big wins on the ATP World Tour for three decades.

Ernesto Escobedo is enjoying a breakthrough week in Houston.

#NextGenATP player Ernesto Escobedo reaches his first ATP World Tour semi-final in Houston.

American John Isner expresses relief after reaching the Houston quarter-finals.

Jack Sock improves to 19-5 on the season with his second-round victory against Tommy Haas.

Thomaz Bellucci improves to 2-0 against Frances Tiafoe in their FedEx ATP Head2Head rivalry.

Feliciano Lopez advances to the second round in Houston on Wednesday.

Fernando Verdasco celebrates his third career win against Kevin Anderson in their FedEx ATP Head2Head rivalry.

Jack Sock and John Isner are among the Americans who have embraced the clay.

Heavy rain cancels play in Houston on Tuesday.

Former Houston champion Tommy Haas scores his first win of the season.

Former champion (2004) Tommy Haas prepares for his ninth U.S. Men's Clay Court Championship.