#2 Romelu Lukaku
When Manchester United signed Romelu Lukaku last season, much was expected of the big Belgian to fill the void left by their talisman Zlatan Ibrahimovic, who didn't feature much due to a knee injury.
He did start off brightly, but endured a dry spell in-between, but was again back to his best towards the end of the campaign. Finally, he finished with 27 goals in all competitions for Mourinho's men and was highly praised for his performances.
He was also influential for Belgium in their run at the World Cup, which was cut short by France in the semi-finals. At the beginning of this season, Lukaku started off well, scoring 4 goals in the opening 6 fixtures before enduring a goal drought in the subsequent 8 games.
This dry spell has forced Mourinho to drop his trusted lieutenant in attack and forced Alexis Sanchez and Marcus Rashford to play as the centre-forwards. With Martial firing on all cylinders, Lukaku needs to get his head right and get back to scoring ways.