Fabregas lined up with Hazard for the Blues in the Premier League for four-and-a-half years before the Spaniard left to feature for Ligue 1 outfit Monaco.
Hazard is finding it difficult to adapt to life in Madrid since making a big move from Stamford Bridge in the summer of 2019.
Injuries and series of inconsistent performances have marred the quality of the former Lille forward.
The 30-year-old has scored only five goals and provided eight assists in just 43 appearances for the Los Blancos across two seasons but Fabregas believes the Belgium superstar will still prove himself at the Santiago Bernabeu.
“He knows what I think because I spoke recently and I told him what I feel. Eden knows he has been very, very unlucky. As I player, I think I was with him for five years and he was never injured, maybe only twice and mostly just small things,” he told Goal.
“For me to see that, it is shocking because you could never expect someone so strong, who you had seen fighting day in day out.
“Playing every three days and not getting injured go to one of the best clubs in the world which was his dream to try and reach another level, and now this happens. Of course it makes me sad because I always said Eden had the potential to be whatever he wanted to be.
“He could win Champions Leagues, Ballon d’Ors and talent-wise, he is up there with the best. It is sad to see it but I still think if the little things going against him go the other way, then we will see the Eden we all know and love.”
