Robredo had won the first set of his match with France 's Julien Benneteau 6 - 4 .
Was in a second set tie - break when Julien Benneteau was forced to retire hurt .
Robredo had won the first set of his match with France 's Julien Benneteau 6 - 4 and was in a second set tie - break when Benneteau was forced to retire hurt .