When his pace goes, it will be a big loss.I wonder how many seasons he has left at the top. He turned 31 a month ago and it's rare to see full backs playing for the best sides beyond the age of 32-ish.
I expect he'll retire from international duty after the World Cup when he'll be 32 and a half.
My guess is he has almost 3 more years left for us (34 years old), but if he manages his body well, and City manage his minutes well, it's possible he will retain enough pace to play another year or 2 (MAX) beyond that.