Lucas qualifies for Spain and France - and is yet to announce a decision about his national team prospects.
However, he revealed: "As you know, I'm French and I have a French passport. But hey, we're looking at it, it's in the hands of the lawyers and we have to be quiet.
"My final choice? That, I will not tell you. I spoke with the coach (Didier Deschamps) of the French selection. We talked about everything, I said what I thought, he told me what he thinks.
"After, I think that the coach knows what I think and he is the most important."