Davydenko of Russia, the No. 1 seed, trounced Argentina's Carlos Berlocq, 6-0, 6-4. The eighth-seeded Calleri of Argentina downed wild card Michal Przysiezny of Poland, 6-4, 6-2.
Calleri -- who won the Generali Open at Kitzbuhel, Austria, last week -- has an eight-match winning streak after Friday's victory.
In Saturday's semifinals, Davydenko will play Volandri and Calleri faces Mayer.