Rafael Nadal, Alexandr Dolgopolov advance to Rio Open final

''I'm very surprised because it's on a clay court,'' said Nara, a university student who prefers hard courts.

Alexandr Dolgopolov logged a rare win over David Ferrer to advance to the Rio Open final :: Leo Correa/AP

''I'm very surprised because it's on a clay court,'' said Nara, a university student who prefers hard courts.