Birmingham have signed Nottingham Forest midfielder Robert Tesche on loan.
Goalkeeper Ben Amos has had his loan stay at Bolton from Manchester United extended by a further month.
The 24-year-old has been linked with a move away from the club, although City chief executive Ferran Soriano said yesterday he was not for sale.
Aguero told the Sun: "There are always rumours in the summer. But I am very happy at City. I'm going to work hard and everything else is just rumours.
"Every player wants to play in big teams that win titles. We didn't win anything last season but we have won trophies in the last few years so there is no reason to go."
Aguero's comments came a day after Soriano said the club would not entertain offers for the record £38million signing.
"We have never had an offer and even if we had an offer we would say no," he said.