The Ivorian midfielder is said to be considering a move after his club forgot his birthday.
The African midfielder played a significant role in his side’s Premier League success, but his representative has revealed that his client feels ‘disrespected’ after no-one at the club wished him a happy birthday.
"Yaya is so upset he's thinking of leaving City,” Seluk told The Sun.
“There are a number of things that have happened that have left Yaya feeling bitterly upset. He must concentrate on the World Cup now. But City have treated him with disrespect and have really hurt him.
"They don't know that money can't buy relationships – no Sheikh can buy a relationship. This isn't about money or a new contract – it's about human relationships and City have shown they don't respect him. I repeat, this is not about money. In fact, he would take less to return to Barcelona.
"What happened at his birthday meant the club don't care about him. It was proof. They can say whatever they want, 'Oh we like him but we forgot'.
"Forgot? About Yaya? The player who helped you to be two-times Premier League champions? The guy who helped you win the FA Cup and the League Cup?
"His birthday can be on a normal day and, in a normal team, his team-mates and club would at least give him good wishes.
"But when you win the title on May 11, a day later you go to Abu Dhabi and on May 13 you have a big party to celebrate the title and nobody comes to Yaya to say, 'Happy birthday', what more do you want?"
Toure has become an essential member of City’s team and the newly crowned Premier League champions will surely do whatever it takes to keep him at the Etihad Stadium.
Seluk has been vocal in the past about Toure potentially leaving the club, which could be seen as a ploy to negotiate better terms.