Lionel Messi was 21 when Pep Guardiola became his manager in 2008. There was huge excitement about what the towering young talent might achieve at the time and that meant there was a great responsibility on the shoulders of Guardiola.
He could not have handled the situation better. Guardiola filled Messi with belief and gave him responsibility and enabled him to become arguably the greatest player we have ever seen. Those early years in Barcelona were a masterclass in how to capitalise on momentum and talent.
I use that example because there is now a similar scenario at Manchester City.