Medina Garrigues next will face Greta Arn of Hungary, who likewise had an easy 6-1, 6-2 win over Petra Cetkovska of the Czech Republic.
No. 2 Gisela Dulko of Argentina won 6-0, 6-3 over Romania's seventh-seeded Sorana Cirstea in her quarterfinal.
She will face No. 4 Aravane Rezai of France, who needed three sets to beat sixth-seeded Alisa Kleybanova of Russia 5-7, 7-5, 7-5.
Medina Garrigues reaches Fez quarters
Pliskova, Vinci advance to Prague Open quarterfinals
Nadal through to Barcelona Open quarters
Gonzalez wins at BMW Open; Kohlschreiber out
