BOGOTA, Colombia (AP) Top-seeded Janko Tipsarevic of Serbia advanced to the Claro Open Colombia quarterfinals Thursday night, beating Belgium's Ruben Bemelmans 6-4, 7-5.
Tipsarevic will face the winner of the later match between Australia's Matthew Ebden and Colombia's Alejandro Falla.
In the afternoon session, Italy's Matteo Viola beat fourth-seeded
