According to Tuttosport, the proposal is for a straight loan without a purchase option — an arrangement Real Madrid hope will mirror the formula used with Nico Paz, who spent last season on loan at Como before returning to a permanent transfer this summer.
Mastantuono joined Real Madrid from River Plate in the summer of 2025 for a fee in excess of €63 million, becoming the most expensive sale in Argentine football history at the time.
His first season in Europe did not go to plan. He scored three goals in 35 appearances across all competitions, accumulating roughly 1,500 minutes, with his early promise under Xabi Alonso — eight starts in Real's first 11 matches — interrupted by a groin injury and subsequent tactical uncertainty under both Alonso and his successor Álvaro Arbeloa.
For an 18-year-old signed with explicit long-term ambitions, the numbers represent a stalled trajectory rather than a disaster — but Real Madrid's hierarchy have concluded that what Mastantuono needs most is consistent first-team football in a competitive environment, something they cannot guarantee him at the Bernabéu next season.
Juventus emerged as the most concrete suitor. The Italian club are undergoing their own rebuild following a season that ended without Champions League qualification, and a versatile attacking talent — Mastantuono can play as a number 10, an interior midfielder, or a wide forward cutting inside — fits their stated need for offensive reinforcement at reduced cost.
Real Madrid's terms are firm: a loan only, with no purchase option, buy-back clause, or any mechanism that would dilute their control over his future. The club's view is that Mastantuono remains central to their long-term planning and that this is a development decision, not the beginning of an exit.
Juventus are evaluating the proposal. Tottenham Hotspur and Napoli have also been mentioned as having registered interest in Mastantuono earlier in the year, though neither has been linked with a concrete approach at this stage.
Mastantuono's contract runs until 2031 — itself a signal of how much Real Madrid still believe in the player, even as they accept that belief currently outpaces opportunity.
Whether Juventus accept the loan, or another club steps in with a more attractive proposal for the player's development, the destination matters less to Madrid than the outcome: minutes, growth, and a return next summer as a different player entirely.