In the 65th minute of Tuesday night’s game, Millers keeper Viktor Johansson was beaten aerially by Sean Raggett at the far post as both leapt to challenge Joe Morrell’s cross.
Not that the moment particularly impressed Rotherham’s official Twitter feed, which stated ‘Hirst taps into an empty net’.
It wasn’t quite the accurate picture painted to almost 110,000 followers – and Pompey supporters also noticed.
Twitter account @PompeyNewsNow poked fun at the claim, with Hirst himself among those to like the post aimed at Rotherham.
Hirst’s recognition of Rotherham underselling his goal wasn’t the only amusing Twitter activity from a member of the Blues’ squad last night, though.
Shortly after full-time, Sean Raggett couldn’t resist posting a picture of the Foxes striker partaking in a sponsorship obligation.
Reeco Hackett delivered his response with a number of laughing emojis, while Kieron Freeman replied with ‘My driver.’
However, the best of the bunch came from the former Owl himself, who responded ‘At your service’.
Hirst now has 11 goals for Pompey this season as he flourishes in regular first-team football following a slow start to life on the south coast.