Speaking to The Athletic, Mariano sees parallels between their situations and says leaving Madrid does not mean giving up on a future at the club.

“If Endrick ends up leaving, or a player who isn’t getting much playing time has to go abroad to play, I would tell him to enjoy it a lot, to appreciate that if he’s going to be a starter on the team, that’s the best thing that can happen to him,” Diaz said.

He stressed that regular starts give players a real chance to prove their ability.

"You have to try to prove yourself when they give you that confidence, because it’s not the same when you play a few minutes every three games. You can’t prove your worth in a few minutes. But if they trust you and you’re a starter, that’s when you can prove a lot of things. In this case, if he [Endrick] leaves, he could also return to Madrid," the 32-year-old added.

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"It was one of the best teams I’ve ever played for because it wasn’t just the starters, but also what the press called ‘Plan B’. It was a bit curious, but the truth is that Plan B was like Plan A."

At the end of that season, Diaz moved to Lyon to play regularly, a decision he now sees as crucial in his development. However, he returned a year later after Cristiano Ronaldo's shocking move to Juventus.

"As it was Madrid, I wasn’t going to say no,” Mariano recalled. "But they told me that this time it would be different, and that was one of the reasons I wanted to return."

Injuries derailed his progress, and he was again playing a bench role until his exit in 2023.

Several clubs have shown interest in Endrick, including Manchester United, who saw him as a replacement option after Benjamin Sesko’s injury. But the 19-year-old prefers Lyon, viewing the French club as a place where he can earn minutes, regain confidence and stay in contention for the 2026 World Cup with Brazil. Madrid had initially wanted to loan him within La Liga to help him adapt more smoothly and keep him close to home as he approaches Spanish citizenship in six months. However, Endrick pushed for a move abroad, prioritising consistent game time over location.

Ancelotti, now the Brazil national team coach, is yet to call up the young forward in any of the international breaks. However, the former Madrid coach has also urged him to play regularly if he wants to remain in the national-team picture.

"He has to think with his entourage about what’s best. Talk to the club, to see what’s best for him. Endrick is very young, this won’t be his last World Cup," he said. "He could play in the 2026 World Cup, because he has the quality for it, but he could also be in the 2030 World Cup, or the 2034 World Cup, and maybe even the 2038 World Cup (laughs). I believe it’s important for him to get back to playing and show his qualities.”