Hard to see how you extend the contract of a player that is at the end of his top level career, has become injury prone, hasn’t ever been the fittest player & doesn’t seem to be able to recover from injuries very quickly.
As a top earner, in a seriously important position in the team, it is very, very hard to pay serious money to a player for whom you know you need both a replacement AND the significant financial package that will be required to acquire him.
Sergio will leave with the love and adoration of a generation of City fans who saw every record breaking goal. We are all the better for seeing this world class striker spend the best years of his career gracing the sky blue shirt and giving many of us the best, most heartbreakingly ecstatic, moment of footballing brilliance in our lives.
He will be missed, but he will never be forgotten, and may never be replaced...but it is time to start the process to try.