The Sir Bobby Robson Foundation has said they do not believe Norwich City supporters vandalised a garden built in memory of the former Ipswich manager.
The Newcastle Evening Chronicle reported a stone portrait of the former England, Ipswich and Newcastle boss had been defaced, believed to be by Norwich fans after Sunday's match.
But the Sir Bobby Robson Foundation tweeted: 'There is no suggestion that graffiti found in Sir Bobby's memorial garden in Newcastle resulted from Norwich City fans.'
City supporters using the message board on www.pinkun.com condemned the action, expressing their surprise at the alleged incident and describing Mr Robson as 'a great man' and 'a true gentleman of the game'.
Just under 2,000 fans travelled to the north-east to see Paul Lambert's side lose the Premier League battle 1-0 on Sunday afternoon.
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