Real Madrid have reportedly stated their intention to trigger Sergio Reguilon's buyback clause.
The Spaniard departed the Bernabeu last year to join Tottenham Hotspur for £27m and he has since made 46 appearances for the North London club.
Reguilon has played every single minute in the Premier League this season, making the left-back spot his own ahead of Ben Davies.
According to El Nacional, Carlo Ancelotti wants to take the 24-year-old back to the Spanish capital, as the club have a €40m (£33m) buyback clause in place that must be activated by the end of June next year.
The report adds that Reguilon "has already said yes" to a return, meaning "now it is a matter of time" before a deal is concluded.
Real Madrid's current first choice left-back Ferland Mendy was only able to make his first appearance of the season against Shakhtar Donetsk on Tuesday night after recovering from a muscle injury.