FC Porto's hopes of successfully defending their Portuguese Primeira Liga title hang by a thread after a 1-1 draw against Benfica in O Classico at the Estadio do Sport Lisboa e Benfica in Lisbon on Thursday. Second-placed Porto are eight points behind leaders Sporting CP with just three league matches of the season remaining and a maximum nine points available, while Jorge Jesus' Benfica remain four points back of Sergio Conceicao's side in third place.