Megson was at Old Trafford to see Danny Guthrie star for his new club, and he said: "I don't think Danny will be out to prove anything on Saturday regarding the Bolton aspect, but he has certainly got to prove himself to new supporters at St James's Park.
"He did very well against Manchester United last Sunday, but that's not surprising because he's a quality player and a lovely lad, and we wish him all the best at Newcastle."