Roy Keane hilariously shadow boxed Patrick Vieira on the pitch at the Emirates ahead of Arsenal vs. Brighton.
Keane and Vieira are working for Sky Sports for today's Premier League fixtures, which also includes Everton vs. Manchester City.
The pair of legendary midfielders are working side-by-side, but old habits die hard as a brilliant video shows the former Manchester United captain shadow boxing with the Frenchman.
The clip shows the Irishman throwing some mock punches as the ex-Arsenal skipper laughs off his antics in a wholesome moment.
Needless to say, the friendly exchange between Keane and Vieira got fans on social media talking.
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One Twitter user wrote: "The greatest rival in Prem history."
A second tweeted: "Vieira wanted none of that."
A third joked: "Already better than KSI's fight last night."
A fourth added: "This is the most playful I’ve seen Roy."
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Another said: "This is wholesome tbf"
Keane and Vieira enjoyed an epic on-pitch rivalry as Man United and Arsenal battled it out for domestic honours.
But they've put their grudge to aside as they provide anaylsis for Arsenal's home game against Brighton.
The Gunners, who are second in the table, are looking to win their first league title since 2004.
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Topics: Patrick Vieira, Roy Keane, Manchester United, Arsenal, Football, Fan Reactions
Nasir Jabbar