BOGOTA, Colombia (AP) _ Third-seeded Juan Ignacio Chela defeated fellow Argentine David Nalbandian 7-5, 6-3 Friday to reach the semifinals of the $350,000 Colombia Open.

Chela, ranked 60th in the world, came to the fore by taking Pete Sampras to five sets in the Australian Open.

In other singles play, Brazil's Alexandre Simoni upset fifth-seeded Guillermo Coria of Argentina 6-4, 6-4.