Denayer, 20, joined City from the JMG Academy in 2013, and has been able to develop behind his fellow Belgian Vincent Kompany at the Etihad Stadium.
Last season, Denayer played on loan for Celtic in what proved to be a superb campaign for the centre back, and he had hoped to play a part in Manuel Pellegrini's first team this season.
Yet having signed Nicolas Otamendi, Denayer was pushed even further down the pecking order, behind Kompany, Eliaquim Mangala and Martin Demichelis - and he chose to spend another season away from Manchester.
Denayer is currently playing for Galatasaray in Turkey, but will again return to City at the end of the season - and now his agent has opened up about his summer move.
As quoted by The Scottish Sun, agent Jesse de Preter has revealed that the ex-Celtic star had the chance to sign for Sunderland or Norwich City, but instead chose the biggest club available in Galatasaray, citing that he needed ambition in his move.
"Jason could have gone out on loan to Sunderland or Norwich," said De Preter. "They are good clubs but our motto is ‘be part of the success’. I don’t think Jason could rejoin a great club like City after taking a backward step. If you do that you risk settling for second best. It is important for Jason to play for an ambitious club where there is pressure — and the pressure at Galatasaray is huge," he added.
Sunderland's defending this season has left a lot to be desired, and the athletic ability of Denayer would have been well received - and if City don't have plans for Denayer next season, the Black Cats should certainly make a second attempt to sign him.