We need to change the formation, to nice we have a fully fit squad.
The weak links in the first team are Cahill and Alonso. They both lack pace and on numerous occasions are caught out of position, and teams are exploiting this all the time.
Our three at the back is not working this season, because of the lack of pace down the left, opposition forwards pressing us and because Cahill is not comfortable with the ball at his feet. Alonso is too dependant on his left foot, so is regularly losing or giving the ball away.

I want to see us going to a 4-3-3, to be more attacking, but having full backs who can defend, and three mobile ball winning midfielders.

When all fit I want to see us playing this: -

Courtois
Zappacosta Rudiger Luiz Azpilicueta
Drinkwater Kante Bakayoko
Batshuayi Morata Hazard

Subs - Caballero Christensen Cahill Alonso Fabregas Willian Pedro

ps it allows the keeper to kick the ball upfield from goal kicks.