Reguilon is currently on-loan at the Bees from Spurs.
On Mourinho, he told The Times: "I love him.
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"He's a tactical monster, but he also focuses on small personal details. One day he told me: 'If we beat City and you put Mahrez in your pocket, I'll buy you a nice Spanish ham'.
"The next day he was there. He convinces you that you are the best. I think I'm a very high level player, but we have to prove it."