2. Dayot Upamecano
Tottenham need reforms in defence with Jan Vertonghen getting into the last years of his career and Toby Alderweireld past his best days, Mourinho should have a look at his defence.
Thus, Davidson Sanchez is the only viable option in the back. So, Tottenham can go after Upamecano to upgrade the defence. Although, the French defender will be an expensive buy and for that Mourinho would need to convince Levy.
Upamecano has seen an astronomical rise in the Bundesliga with Leipzig and many clubs including Arsenal, Manchester City and Manchester United are already monitoring his situation.