Yaya was so important last season.
Toure was excluded from the City squad for the first months of Pep Guardiola's reign past year, firstly for refusing to leave the club on a transfer last summer and then for comments made by the Ivorian's controversial agent, Dimitri Seluk.
"No, no - it is just a sporting decision", he added.
The Ivorian is yet to make an official appearance for the Citizens this season, and when manager Pep Guardiola dropped him from his squad for the Champions League trip to Feyenoord on Wednesday, it was clear that all is not well between the two once again.
"I spoke with him and he knows the reason why but it is between him and me", Guardiola said when asked about Toure's absence at De Kuip, although he clarified application in training was not the issue.
Starsport understands Guardiola has genuine concerns that Toure's legs have gone and that he isn't mobile enough to perform at the highest level.
The 34-year-old signed a one-year contract in the summer, but is yet to feature for the first-team so far this season. Six players finished contracts last season, the only one who stayed is Yaya, because he is a special player.
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Guardiola, meanwhile, confirmed that Ederson has travelled to Holland and could line-up against Feyenoord despite having stitches in his face following his clash with Liverpool's Sadio Mane last weekend.
Ederson resumed training with his team-mates wearing protective headwear due to facial scarring from the incident and was part of City's travelling party on Tuesday.
City defender John Stones praised the keeper's bravery, saying: "Ederson has got on with it straight away".
"After the game he was speaking to the boys as if nothing happened. I want more - not just from Yaya, I want more from everyone".
The Brazilian goalkeeper has been training in a scrum cap and Guardiola will leave it until tomorrow to decide if to start with him or not.
City will also miss centre-back Vincent Kompany for the game due to a calf injury he picked up during the worldwide break. He is much better. "We will see in the next weeks but I think it will be soon when he comes back and fights to play".