Francisco Clavet defeated Alberto Berasategui 6-7 6-1 6-2 in the Buenos Aires quarter-final on clay. The upset overturned the form book — Alberto Berasategui came in defending last year's final, but Francisco Clavet had been the form player, winning 2 of their last 4 on clay. Francisco Clavet extended the head-to-head to 2–1.
Clavet F. came through in three sets.