Darren Bent insisted he had to leave Aston Villa after too many "slaps in the face".
Brighton defender Greg Halford has agreed to extend his loan deal from Nottingham Forest until the New Year.
City boss Roberto Mancini has already admitted an interest in the Brazilian and the player himself is also keen to head to the Premier League in search of a higher profile.
"I believe my chances of making the World Cup squad will improve if I join City," said the 28-year-old star, quoted in The Sun.
"My exposure would be better, because Brazil is biased towards the Ukrainian league.
"What we do here is not recognised in my country. Playing in a division, at a club that is considered among the best in the world would help me get back in the Brazilian national team.
"There are a lot of people in England with good football knowledge. Those complement my skills and motivate me to want to play in the Premier League."