Saturday's doubles matches see Argentine pairing Carlos Berlocq and Eduardo Schwank take on IvoMinar and Lukas Rosol -- who dumped Rafael Nadal out of Wimbledon in June.
In Coquimbo, the Czechs are in control of their tie after IvoMinar, ranked 247 in the world, produced a major upset when hammering Chilean number one Nicolas Massu 6-0, 6-2, 6-3.