Martin O'Neill after the Treble-winning manager criticised "basement dweller" pundits. O'Neill made the comments during the BBC's coverage of the Scottish Cup Final between Neil Lennon 's Hoops and Hearts on Sunday, which was won by Kristoffer Ajer 's crucial winning penalty in the shootout after a 3-3 draw by the end of extra-time.
As a coach he took Celtic to the UEFA Cup final in 2003 with current gaffer Lennon a key component of that side - and in his defence of his former player's position in charge at Parkhead, he lashed out at critical ex-pros in the media.
Walker clearly took issue with that comment as he said the staunch defence of Lennon, who has brought some fans back onside despite fierce protests by completing the quadruple.