The Wales international has been heavily linked with a move to the Bernabeu with speculation putting a potential transfer fee in the region of £85 million - which would break the current transfer £80 million record which Real Madrid paid to Manchester United for Cristiano Ronaldo.
However, Fabregas does not understand how a club could be prepared to spend such a substantial figure.
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“He is a great player with all the right attributes, but we will have to see if Madrid sign him and if he can perform there.”
Fabregas also reiterated his desire to remain at Barcelona despite continued speculation linking him with a return to the Premier League.
“People talk a lot, but the truth is that no one has spoken with me,” he added.
“I want to triumph in Barcelona. That club is my home and I always dreamed of playing there, so I will try and succeed there as long as I can.”
The midfielder also insisted newboy Neymar will need time to settle at Camp Nou, adding: “Neymar will need time to adapt because he is coming from a completely different type of football.
“We need to help him settle in and grow so that he can give us great nights.
“The egos are very controlled in our team. [Lionel] Messi has won the Ballon d’Or four times and is probably the best player of all time - but when you see him every morning, he doesn’t seem like it.”