Roy Keane has jokingly labelled Theo Walcott as 'naive and young' after the former Arsenal star claimed his former side are currently a 'bigger club' than Manchester United.
Walcott, who recently announced his retirement from football, joined Sky Sports for their coverage of Arsenal's crunch home tie against Man United.
Ahead of the meeting of the two rivals, fellow pundit Micah Richards asked Walcott for his opinion about which of the two sides are currently the biggest club.
Walcott, who played for Arsenal between 2006 to 2018, pointed to the Gunners finishing as runners-up in the Premier League last season behind Man City.