Tuesday marked the four-year anniversary of the Newcastle United takeover by a consortium backed by the Saudi Public Investment Fund.

The Magpies have made giant strides both on and off the pitch in that time but still have a way to go on both fronts to firmly break up the Premier League's big six clubs.

On the pitch, there is an argument Newcastle already have done. After all, they have won a trophy and finished fourth, seventh and fifth in the last three seasons. For context, Chelsea, Manchester United and Tottenham have not managed to finish in the top seven in all three of those seasons.

However, there is a giant gap when it comes to the revenue those teams produce.

Commercially, Newcastle are the best of the rest in the Premier League but are still €168million short of the lowest ranked of the big six clubs (Arsenal). Similarly, Newcastle are the seventh highest grossing Premier League club in terms of overall revenue (€371.8m) but are...