Eden Hazard is "medically perfect" but there is concern about the Belgium star's injury problems, according to national team boss Roberto Martinez.
The playmaker has endured a miserable time in Spain due to persistent physical issues since his move from Chelsea in 2019 for a reported €100million (£88.5m).
Hazard has only completed four matches for Los Blancos in all competitions, scoring just five goals in 51 appearances in total, as patience over his lack of availability runs thin among fans and local media.
The 30-year-old impressed in the first half of the Nations League semi-final against France last week, as Belgium took a 2-0 lead into half-time, but he was taken off in the 74th minute as Martinez's side went on to lose 3-2 to the world champions.
Hazard sat out the 2-1 third-place play-off defeat to Italy, Martinez saying he was suffering from "muscle fatigue" but adding he did not know how long the former Lille star would need to recover.
Indeed, Martinez has found it difficult to determine why Hazard, a player he believes can still challenge for the Ballon d'Or, has endured so many injuries since his move to Spain two years ago.
"It's certainly true that Eden is not now in a physical situation to be at 100 per cent for 90 minutes," Martinez told El Larguero. "What's important now is to have patience, to work well and try to get Hazard, bit by bit, to get back to that level he's always had.
"His situation in Spain is very atypical. He found a situation that's new for him, because he was never injured and suddenly finds himself over the course of two years with no explanation for so many injuries.
"We're all worried and I'm sure Real Madrid are as well. He's a player who needs the ball, needs to dribble, and in order to reach his maximum physical level, he needs to play games.
"What I've seen is that he is medically perfect. The first 45 minutes [against France] were really enjoyable. We hope that, between Real Madrid and the national team, we can help him so he can get the minutes he needs. If he's at the level of those 45 minutes against France, I'm sure he'll bring a lot of success to Belgium, but especially to Real Madrid."
Martinez's future has come under scrutiny in recent weeks following reports he was a prime candidate to take over from Ronald Koeman as Barcelona head coach.
That was until Barca president Joan Laporta insisted he would give Koeman time to turn things around amid a run of just two wins in eight matches in all competitions.
Regardless, Martinez says he has not spoken to the club and has not yet decided if he will commit to the Belgium job beyond next year's World Cup in Qatar.
"It's been a difficult period because it seems like you don't want to answer, but the truth is they've not had any contact with me," he said.
"You know how rumours with coaches work. It's nothing more than an anecdote that helps me start the day with a smile.
"I still haven't decided [if I will stay after the World Cup]. Whenever I talk about my future, I don't usually clarify it.
"We're continuing a really beautiful, ambitious project and you have to think day by day. I've learned that the emotional side of a national team is on another level to what happens at a club."