Cotonâ€™s Â£500,000 move across ÂManchester from City to Manchester United in 1996 prompted an angry fan backlash.
But even though he didnâ€™t play a first-team game for United, his sheer presence prompted Peter Schmeichel to respond with a string of performances that helped land a Premier League and FA Cup Double.
Coton said: â€œThe best piece of Âadvice I ever heard came from a tennis coach, who said that to get to No.1 in the world and stay there you always have to train like youâ€™re No.2.
â€œWhat he meant was that it is hard to get to the top â€“ but even harder to stay there. When you are the best, complacency can creep in. You donâ€™t notice that itâ€™s Âhappening at first and, when you do, it can be too late.
â€œHart is the best keeper at City and heâ€™s also the best English keeper around by some distance. But he faces no Âcompetition for club or country.
â€œHe goes into every game Âknowing that he will stay in the team Âregardless of how he plays that particular week. Itâ€™s the same when he plays for England."