Keane, along with fellow Sky Sports pundits Jamie Redknapp and Izzy Christiansen, were receiving final instructions from producers to come back out of an ad-break before the Man United legend set off to confront one particular fan, who had stayed behind to goad him, MailOnline reports.
In a video exclusively filmed by Mail Sport, the former Manchester United captain, who managed Ipswich between 2009 and 2011, could be seen putting down his microphone, placing his hands in his pockets and walking over to confront the fan directly before a heated back-and-forth ensued.
A subsequent video shared to social media after the match showed Keane, 53, continually telling the fan to ‘wait and discuss it in the car park’ as abusive remarks were hurled in his direction.
As the heated exchange occurred, other fans from the Ipswich end spewed insults in his direction, with one man in the upper tier rushing across to shout: ‘F*** you Keane!’
Keane was guided back to the broadcast by a member of the production team as the fan appeared to revel in getting a rise out of the Sky pundit.
As Keane walked back to join the Sky Sports panel, a nearby steward told the fan to calm down moments before Redknapp jumped in to say a few words.
The former Republic of Ireland midfielder held a heated and tense relationship with some Ipswich supporters during his reign at the club – and once admitted that his feud with the fans spurred him on.
Before becoming one of Sky Sports’ most recognisable pundits, Keane carved out a career in management during the 2000s and early 2010s, first coaching Sunderland for two years before moving to Portman Road in 2009.