Newcastle United will have to do some spending this summer. Quite whether or not the FFP limitations the club are working under genuinely afford Newcastle the chance to fully rebuild their squad remains to be seen of course, but it is clear that changes are required. Indeed, this season has proven a struggle at times, despite some excellent moments throughout it. Fresh faces will be needed in defence, there is little doubt about that. Even before Sven Botman’s second serious knee injury of the season, the club were reportedly looking to strengthen there. The defence has proven porous all seaso…