A week later, footage was uploaded on social media by a Notts County fan who can be heard shouting "leave them alone" as the steward kicks out at fans running on to the pitch at full speed.
A Portsmouth fan who noticed the video online said: 'It might have been done in the heat of the moment, but he clearly gave fans no warning of what he was going to do.
"One moment they were running at full tilt, the next a leg had been kicked out to trip them as they hurtled by.
"They shouldn't actually have been on the pitch, but it was a spontaneous and joyous show of excitement by supporters and for a steward to do something so dangerous was completely disproportionate."
It is a criminal offence for any fan to be on the pitch at a football ground without good reason.
However, the victory marked a change in fortune for Portsmouth, who were relegated three times in quick succession after financial problems saw them tumble from the Premier League in 2010 to the fourth tier in 2013.
Another fan of the south coast club said on an online message board: "That's disgraceful. Once there are more than a few hundred on the pitch they shouldn't act like that.
"It could have caused some serious injury when they are randomly kicking the fans to trip them up."
The steward who appeared to trip jubilant Portsmouth fans as they surged on to the pitch has been dismissed for 'improper conduct'.
A spokesman for Notts County said: 'He has been dismissed by the third-party organisation he worked for.
"They have reviewed the case and dismissed him for improper conduct, following assistance from the club in providing the footage."
