Leicester City fan Cameron Toner has been sentenced to four months in youth custody after assaulting three Nottingham Forest players during a match at the City Ground.
The 19-year-old, from Leicestershire, appeared in court charged with three counts of common assault and going onto the pitch at the football match.
He will serve half of his four-month sentence for assault before being released on licence, and has also been handed a £100 fine for entering the field of play during the FA Cup match on February 6.
Toner appealed guilty to assault by beating all three players and going into the playing area, the Nottingham Post reports, and gave a statement in court before being handed his sentence.
“I was under the influence of alcohol, having started drinking at 11am. I was not myself," Toner said, as reported by The Athletic.
“I wish to apologise to Nottingham Forest, their players and supporters. I also wish to apologise to my friends, my family and all those connected with Leicester City.
“It was probably the adrenaline that kicked in.”
The court also heard a statement from Keinan Davis, one of the trio assaulted along with teammates Brennan Johnson and Djed Spence as the home players celebrated Joe Worrall's goal during the first half of the game.
"I remember feeling shock about what happened and confused - how a man got on the pitch towards the players," Davis said in his statement.
"I have no lasting injury but feel shocked and alarmed by events".
Leicester City had already pledged to hand the fan "A lifetime ban from all Leicester City fixtures at home and away" after the incident, which took place during a 4-1 defeat which saw the Foxes eliminated from the FA Cup.
"It was a determined attack on Forest players and, in my view, was cowardly," district judge Leo Pyle said in an address to Toner before handing out the four-month sentence.
Assistant Chief Constable Steve Cooper, of Nottinghamshire Police, had confirmed the authorities had been working with both clubs in the aftermath of the incident.
“Violence at football matches will not be tolerated. In this case Leicester City has said the individual involved will be subject to a life-time ban from all Leicester City fixtures at home and away," he said.
“I hope the actions taken serve as a warning to anyone else that violent behaviour at football matches is taken extremely seriously and could land them with hefty consequences.”
Goals from Philip Zinckernagel, Johnson and Worrall had given Forest a three-goal lead against Leicester, with Kelechi Iheanacho pulling one back before Spence completed the scoring and eliminated the FA Cup holders from the competition.