In a couple of mild upsets from Winston-Salem, Yen-Hsun Lu defeated Pablo Andujar 6-4, 6-3 while Robin Haase defeated Lukas Rosol 6-4, 3-6, 7-5 on Monday.
Andujar came into the tournament as a 16 seed while Rosol entered as a 12 seed. Rosol is currently the 45th ranked player in the world, Andujar is 55th. But both Lu and Haase are in the top 62.
With the victory, Lu will face the Steve Johnson-Andres Seppi match. Haase awaits the Verdasco-Smyczek victor.