Manchester City manager, Pep Guardiola, has said the team will not collapse like Manchester United, if he decides to quit as manager in the summer. United have failed to win the Premier League title since Sir Alex Ferguson stepped down in 2013. City have won it in six of the last seven seasons and Guardiola believes they will continue winning even after he departs the Etihad Stadium. “I don’t know what happened [at United],” Guardiola said. “It will be a bad sign for the club if after just one person leaves and everything is dragged down. Maybe they will make mistakes, but during the mistakes …