Seeds bloom in Buenos Aires
David Ferrer led the way as the leading lights all progressed to the third round of the Copa Claro in Buenos Aires.
The top seed overcame a slow start to beat the dangerous David Nalbandian 2-6 6-4 6-0.
Fellow Spaniard Nicolas Almagro had things a little easier as the second seed saw off Andrey Kuznetsov 7-6 (7-5) 6-2.
In fact there will be a distinctive Spanish feeling to the third round after Albert Ramos and Tommy Robredo came through in straight sets.
Eighth seed Ramos defeated Leonardo Mayer 6-3 7-6 (7-3), while Robredo came past Diego Sebastian Schwartzmann 6-3 6-1.
No 3 seed Stanislas Wawrinka registered a routine 6-1 6-4 win over another Spaniard in Daniel Gimeno-Traver, while sixth-ranked Fabio Fognini was a 7-5 6-2 victor against Marco Trungelliti.
Unseeded duo Julian Reister and Federico Del Bonis also booked their places in the next stage, recording wins over Aljaz Bedene and Albert Montanes respectively.