Kieran Tierney was forced to apologise after he was photographed celebrating Arsenal’s win over Manchester City in Saturday’s FA Cup semi-final with an offensive gesture.

The summer signing from Celtic was at heart of a magnificient second half rearguard action as Arsenal booked their place in next month’s final against Chelsea.

Two goals from captain Pierre-Emerick Aubameyang helped end run of seven consecutive defeats against City for the Gunners, whose players were in justifiably jubilant mood in the dressing room afterwards.

‘Tierney, however, was getting posted,’ he said after goalkeeper Emiliano Martinez uploaded the customary dressing room selfie. ‘Was a joke with the kitman. I’m so sorry if it caused anyone offence, wasn’t meant in any way.