Bruce detailed the abuse he had received during his reign at St James' Park and suggested he may now walk away from the game.
"It was a very honest statement," the Austrian said. "I must say I never had such abuse in my entire managerial career and I wouldn't know how I would react to it.
"He [managed] a lot of games, he made it to 1,000, and that is unbelievable for me. It is an unbelievable number and he was a fantastic colleague, a really good guy.
"I think he can be proud of all he has done. He should look back on a very, very successful career as a manager."
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