#3 Mentality
Manchester United managed a 2-2 draw against Arsenal in midweek. It is not a poor result considering Arsenal are now 20 games unbeaten, but they are also the team who failed to register a victory at Old Trafford since 2006, and were considerably exhausted after a North London derby.
Although the scoreline suggests that the match between the two teams ended in a draw, Manchester United played as if they were the second best team. Despite playing in a home game, the United players showed a distinct lack of hunger and desire to win the game at times, which gave Arsenal the upper hand.
United boss, Jose Mourinho, is clearly unhappy and frustrated with both the mentality and the results. Mourinho stated that his side lack a "mad dog" mentality and willingness to fight for the team after their clash against Southampton, but against Arsenal that didn't improve.