Douglas is off contract in June and attracting interest from several clubs.
"I know there is serious interest from Anzhi," Marcos Paulo Ribeiro told Izvestia. "It is nice that there is interest from big clubs.
"However, Douglas has expressed a desire to play in Serie A.
"Inter are a great club and the President Massimo Moratti is a great person. He has made an offer and it is hard to refuse."