LAS VEGAS (AP) _ Top-seeded Grant Stafford of South Africa advanced to the quarterfinals of the Luxor Las Vegas-USTA Men's Challenger tennis tournament Wednesday by defeating Israel's Eyal Ran 6-2, 6-3.

Jan-Michael Gambill of Seattle ousted local favorite Luke Smith 6-4, 6-4. A native of Australia, Smith won the 1997 NCAA singles and doubles championships for UNLV.