Cristiano Ronaldo's return to Manchester United started off with a bang. The Red Devils secured a remarkable 4-1 win over Newcastle that day, with the Portuguese striker scoring a brace. Since that dream debut, United have only won two from seven matches, playing some of the worst football they've displayed in the Ole Gunnar Solskjaer era. Questions continue to persist regarding Solskjaer's future, but the problems at United lie far deeper than the manager himself. Here is a tactical analysis of United's tactical follies in the post-Ronaldo era.