Lucas was watched by Real coach Jose Mourinho in action for Brazil against Denmark last weekend.
And last night he revealed: "My father has gone to Spain with my agent to talk to the executives of Real, I think even with (president) Florentino Perez.
"There has been talks, but as yet there is nothing official."
He added: "Obviously, we're talking about one of the biggest clubs in the world. But right now I focus on Sao Paulo."