Real Madrid president Florentino Perez is upset with Jose Mourinho over Manchester United's stand regarding David de Gea negotiations.

Perez has been willing to include several major players in negotiations, including Gareth Bale and Raphael Varane, however Mourinho has insisted only on one man this summer, says Don Balon.

The United manager is demanding only Toni Kroos in exchange for his goalkeeper - a player Florentino has long considered untouchable.

The Real president feels Mourinho is being deliberately difficult, knowing full well how highly regarded Kroos is inside Madrid.

After going into the summer transfer window confident of smooth negotiations for De Gea, Florentino now feels 'almost betrayed' by Mourinho over his stand.