Ferrer beat Chiudinelli 6-2, 7-6 (5), 6-1 Friday after Stanislas Wawrinka gave Switzerland a 1-0 lead by rallying past Nicolas Almagro 3-6, 6-4, 3-6, 7-5, 6-3 on clay at the bullring in Logrono, Spain.
Spain is playing without Rafael Nadal, who has a knee injury. The Swiss are playing without top-ranked Roger Federer. He ruled himself out because of scheduling.
On Saturday, Spain's Tommy Robredo and Marcel Granollers will face Wawrinka and Yves Allegro in the doubles.
The winner of the series will play either France or Germany in the quarterfinals on July 9-11.
Krasic ponders summer switchWithout Nadal, Federer, Spain faces Switzerland