John Isner beat recently retired Juan Carlos Ferrero 7-6 (2), 6-3 on Friday night in the Miami Tennis Cup exhibition event.
Isner won seven straight points in the first-set tiebreaker after dropping the first two.
Ferrero, the 2003 French Open champion, surrendered his serve in the eighth game of the second set to enable Isner to serve for the match.
In the first match, Nicolas Almagro beat Alejandro Falla 6-4, 6-1. Almagro won the final two games of the first set and easily finished off Falla in the second.