He refused to speak to the Italian newspapers after the 2-1 Italian Super Cup defeat to Milan, but was quoted in Holland.
"I only know Inter need money and I could leave if the right offer comes in," he told Voetbal International.
"I have a five-day holiday after Wednesday's friendly against England and I hope the issues regarding my future can be clarified during that time off.
"I am proud to hear both United and City are interested in me, but so far I have not had contact with either club.
"When it comes to my future, that is all I can say."