Is Chelsea new-boy Enzo Fernandez worth over $123 million?

When you consider that Potter already had Kovacic, Mount, Gallagher, N’Golo Kante, Ruben Loftus-Cheek, Denis Zakaria, Lewis Hall and Chukwuemeka to choose from, with Jorginho having departed for Arsenal on deadline day, you might think spending nine figures on another midfielder to be somewhat indulgent.