Florentino Perez and the other members of the Real Madrid hierarchy were intrigued by the comments made by Louis van Gaal that Manchester United have interest in Cristiano Ronaldo.

Real Madrid have already debated whether they should sell Ronaldo in the January transfer window.

Real Madrid believes Ronaldo will only retain a significant transfer value if he's sold in January or in the summer.

Manchester United, Manchester City and Paris Saint-Germain are considered the three viable clubs who could buy Ronaldo.

Ronaldo's contract with Real Madrid runs through 2018.