Sao Paulo had emerged as rivals for Robinho's signature having been alerted to his availability over the weekend.
Related ArticlesGiggs: winning trophy better than beating CityMancini: Manchester must not look back in angerPolice arrest three more ahead of Carling Cup semiFerdinand leaves United punch drunkMan Utd v Man City: match previewSport on televisionBut the 26-year-old, who arrived at Eastlands in a £32.5m transfer from Real Madrid in Sept 2008, has told ESPN Brazil that he is only prepared to return to Brazil for Santos.
Robinho said: 'I appreciate the interest of the directors of Sao Paulo, but it is well under way with the Santos.
'Sao Paulo is a big club, but if I have to go back to Brazil, it will be for Santos.'
Meanwhile, City manager Roberto Mancini has insisted that for the club to complete its aim of joining the European elite in the coming years everyone will need to keep a cool head.
'I don't feel pressure,' he said.
'I played football for 20 years and I managed at other clubs.
'I hope it is possible that in the next year we can be among the best five or six clubs in the world.
'But to achieve this we must work. We cannot make mistakes.
'And if I want to change a tactical situation during a game it is important I have a clear head.'