City are quite capable of briefing the press when they want to eg Gundogan, 'he will stay with us for another year even if that means he goes on a free at the end of it.'
The risk for anyone in his position who may chose to run down his contract and is long term loss of form or long term/career ending injury. I wonder whether they can insure themselves for this. The rest of his current contract is worth approx £6m whereas his new 5 year? contract offer is probably worth at least £40m plus bonuses. Its a game of poker with high stakes.
Personally with the recent history between BM and us, I would tell them to do one. They can't wait two years for a winger. I would then openly report them for tapping up. However, City are far more classy than I am, so will probably remain silent.