Sam Allardyce was named manager of Sunderland last week, and his arrival should go a long way to improve the defence of the Wearside club - having shipped 18 goals in eight games this season.
There is not one defender who could be considered as enjoying a good season, although Tottenham youngster DeAndre Yedlin has been winning some praise for his attacking play from full-back.
The USA international arrived at the Stadium of Light on transfer deadline day for the season, with Spurs hoping to see their young full-back develop into a Premier League-level player after a slow start at White Hart Lane.
So far, Yedlin has proven his attacking efficiency, utilising his pace and athleticism to good effect, but the doubts remain about his ability as a defender - a strange doubt considering he is a natural full-back.
However, now could be the perfect time for Yedlin to start working on his defensive play, as he will likely be first-choice right-back in Sam Allardyce’s tactical set-up - which is heavily focused on keeping the ball out of your own goal.
Yedlin will be forced to sit back and attack less, and the only area of his game that Allardyce will care about will be his ability to win the ball back, hold a defensive shape, and show concentration for the entire 90 minutes.
These are areas of his game he has struggled with, and playing under Allardyce may be the best developmental curve Yedlin could enjoy at this stage of his career.
Yedlin wants to make it at Tottenham, and learning to defend at a Premier League standard will be vital if this situation is to occur, meaning Allardyce is the most important person in the 22-year-old’s career right now.