Haas out of US Clay Courts with knee injury
HOUSTON (AP) Former champion Tommy Haas withdrew with a right knee injury Monday during qualifying in the U.S. Men's Clay Court Championships.
Haas dropped out before his match. He won the tournament in 2004.
Haas warmed up against Go Soeda of Japan at River Oaks Country Club before deciding he could not continue.
Top-seeded Mardy Fish, who withdrew from Davis Cup play last week following what he called a health scare, has a bye into the second round and will play his first match Thursday.
Updated April 9, 2012