Cruzeiro admit Real have tabled several offers for the youngster, but none have reached their valuation.
"I am expected back in work next month; there have been a lot of rumours and speculation regarding a possible move to Real Madrid.
"The winter transfer window isn't open in Europe until January but once the market opens, anything can happen," Lucas Silva told Globoesporte.
"A lot of stories are coming out in the press and I am getting a lot of questions about Real Madrid. All I can say is that there is nothing decided. I am a Cruzeiro player, I had a good season last year and anything might happen at a later date. I have my own objectives and challenges. It would be a dream and a step forward in my career."