Zweeler.com start list for US Clay Court Championship Houston

Argentina (3)
Kicker, Nicolas
Pella, Guido
Zeballos, Horacio
Australia (2)
Kyrgios, Nick
Thompson, Jordan
Croatia (1)
Karlovic, Ivo
Germany (1)
Brown, Dustin
Japan (2)
Daniel, Taro
Nishioka, Yoshihito
Mexico (1)
Escobedo, Ernesto
Serbia (1)
Kecmanovic, Miomir
Slovenia (1)
Kavcic, Blaz
Spain (1)
Verdasco, Fernando
Switzerland (1)
Laaksonen, Henri
United States (14)
Fratangelo, Bjorn
Fritz, Taylor
Harrison, Ryan
Isner, John
Johnson, Steve
Kozlov, Stefan
Kudla, Denis
McDonald, Mackenzie
Querrey, Sam
Sandgren, Tennys
Smyczek, Tim
Sock, Jack
Tiafoe, Frances
Young, Donald