The United boss has prioritised strengthening his midfield in the transfer market this summer.
But following further failing against Newcastle on Sunday, central defence is an area that needs attention too.
Targets have been identified with the likes of Tottenham’s Toby Alderweireld and Leicester’s Harry Maguire linked.
However, Mourinho has a long-standing interest in France international Varane, who he gave his debut too while manager at the Bernabeu.
And with Real president Florentino Perez willing to do anything to land United’s world-class goalkeeper De Gea this summer, it seems Mourinho’s intentions are clear.