By Alasdair Fotheringham MAIRENA DEL ALJARAFE, Spain (Reuters) - Czech Zdenek Stybar defeated world road race champion Philippe Gilbert by centimeters on stage seven of the Tour of Spain on Friday to seize his first victory in a Grand Tour. The pair broke away in a twisting finishing circuit on Mairena del Aljarafe's narrow streets before Stybar outduelled his Belgian rival. German Robert Wagner was third in the 205.9-km leg from Almendralejo. ... More...