Chris Sutton got it wrong when he said Celtic showed other teams how to beat Manchester City.
"Looks like Celtic have inspired teams on how to play against Peps men."
Pep Guardiola does not change the way he plays, he played the same way at Barcelona and is trying to teach the same thing at Manchester City who see themselves as the next Barcelona.
Mauricio Pochettino has played and beaten Gurdiola sides, one win and three draws with five defeats. Now that isn't a bad record for a club who had to sell their best players every six months just to survive as opposed to the wealth and talent Barcelona have.
Gaining that victory and those draws was because of the system employed to counter it, not the talent of the players playing them. The how to beat a Guardiola system is therefore known to Pochettino and Brendan Rogers will have looked at those games and seen how it was possible to play them.
Celtic didn't teach others, others taught Celtic.