Peter Grant immediately spotted a furious response from Brendan Rodgers after an attempted flick by Celtic star Mikey Johnston.
It was a thrilling pre-season friendly encounter as the Scottish Premiership winners faced off against their English Premier League counter-parts - with the Hoops taking a 3-1 lead into the break against Pep Guardiola 's men.
However, Celtic would ring the changes at half-time with winger Johnston among those to join the action after the restart. Youngster Maximo Perrone almost instantly pulled a goal back for City - leaving the Hoops on the back foot as they attempted to hold their advantage despite relentless attacks from the Sky Blues in North Carolina.
Greg Taylor attempted to spearhead a counter-attack down the left and found Johnston. However, the former West Brom loanee looked to back heel the ball forward - but sent it straight out of play.
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