RIO DE JANEIRO, Dec. 11 (Xinhua) -- Santos has made a written offer for AC Milan winger Robinho, the Brazilian club revealed on Tuesday night.

Reports in Brazil have strongly linked the 28-year-old with a return to his former club in the January transfer window and Santos president Luis Alvaro Ribeiro said the move could be confirmed within days.

"Robinho is very keen to return to Brazil and that means coming back to Santos," Robinho told TV O Povo.

"We have presented a written offer, though there is a difference between what the player and the club are asking for.

"It is not an easy negotiation process, but we will know the outcome next week."

Robinho helped Santos win the 2002 Brazilian championship with an impressive debut season as an 18-year-old. He played a leading role in the club's 2004 Brazilian championship success before being sold to Real Madrid in 2005.