Doubts have persisted over Hazard's quality at Real ever since his summer arrival from Chelsea, with much of his season plagued by injury.
But younger brother Kylian, now with Cercle Brugge, told La Dernière Heure: "Eden is still doing well. Anything can happen, mentally, he will be fine.
"He still has time. This is not his last year at Real. During his first season at Chelsea, people were wondering about his level and he became one of the best players in the Premier League in recent years.
"When he is 100%, he is on another planet. In any team, he will be the best. He has the qualities. When he can show them, we will say 'wow'."
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