Sweeting shocks Korolev to get back on track

HOUSTON: American qualifier Ryan Sweeting posted his first ATP Tour win of the season by upsetting fifth-seeded Kazakhstani Evgeny Korolev 6-3, 4-6, 6-2 at the US Clay Court Championships.

The 150th-ranked Sweeting converted three of his six break point chances in the decisive set on Tuesday to clinch the win in one hour and 54 minutes.

Fellow American Mardy Fish withdrew due Tuesday to the ongoing effects of a nerve injury sustained in a fall at the Sony Ericsson Open in Miami. Seventh seed Michael Russell also pulled out with a leg injury.

Fish was replaced in the main draw by Indian Somdev Devvarman, while Michael Yani took the place of Russell.

Devvarman defeated Ireland''s Conor Niland 6-4, 6-2 to set up a second-round contest with defending champion Lleyton Hewitt of Australia.

Yani lost to Kazakhstan''s Mikhail Kukushkin 6-1, 7-5.

A pair of Argentines, sixth seed Horacio Zeballos and Juan Ignacio Chela, both won their first-round matches on injury retirements.