The chant before kick off went “You’re supposed to be at home” and for a second it was difficult to work out who was singing it. In a unique turn of affairs, this FA Cup fourth round tie had cast Birmingham as visitors to their own ground. The stadium that has been their permanent home since 1906 is also Coventry’s temporary residence this season and, as the first name out of the hat, they became the home team.

The chant, therefore, was from the Sky Blues fans, mocking their hosts, who were also their guests. Birmingham fans got their own back: “Our ground’s too big for you,” they hollered.