Speaking from Chelseaâ€™s US training base, Ivanovic claimed Manchester United will start the season as favourites to win the Premier League.
"City will find it a lot more difficult next season, every team will want to beat them because they are the champions," said the Serb.
"It was the same with us, when you win something - it doesnâ€™t matter if itâ€™s a big or small club - they will fight and have extra motivation.
"The real test of a good team is if they can be successful again in the next season, particularly in the Premier League because itâ€™s a long season and everyone wants to beat you."
He added: "For me Manchester United are always the number one favourites."