LOS ANGELES (AP) -- Teenager Ryan Harrison continued his recent run of strong play by beating fellow American Michael Russell 6-3, 6-4 on Wednesday to reach the quarterfinals at the Farmers Classic.
Yen-Hsun Lu of Taiwan had the day's biggest upset, defeating No. 3 seed Marcos Baghdatis of Cyprus 6-3, 6-4 to set up a matchup against Harrison, who is attempting to make consecutive semifinals appearances.
Baghdatis, ranked 30th in the world, was playing his first match after receiving an opening-round bye.
Ernests Gulbis of Latvia had little trouble in defeating qualifier Daniel Kosakowski 6-2, 6-4. Gulbis will play the winner of No. 2 seed Juan Martin Del Potro and James Blake, who take the court in Wednesday's late match.
In early doubles action, Somdev Devvarman and Treat Conrad Huey took out top-seeded Marcelo Melo and Bruno Soares 6-3, 6-4.