The empty seats in the Manchester City end at Wembley on Saturday has again reignited the almost annual debate over whether the biggest stadium in the country should host FA Cup semi-finals. Pep Guardiola 's side avoided a shock against Southampton as Nico Gonzalez scored a rocket with three minutes left to secure a 2-1 win. But plenty of attention was on the swathes of unsold seats in the City end. The 90,000-seater stadium has hosted FA Cup semi-finals ever since it was re-opened in 2007 but