Ferguson took a keen interest in England's World Cup qualification last week.
He admitted: "What I find quite interesting - and I probably knew this - is that football is a media industry, too.
"In the past, I probably never bothered about seeing how the press portrayed England for international games.
"I knew the manager's job was a nightmare. Now, I scan papers more than I did in 20-odd years.
"I was interested in reading all the things about Roy and the recent game in Ukraine, the angles they take. Some are pro, some are against, some are middle-of-the-road.
"Roy's reaction was interesting. Roy's a manager of great experience and I was surprised he got annoyed by Gary Lineker, who tweeted that England were awful.
"Gary always comes across with wee throwaway lines. I was surprised Roy got himself annoyed with that."
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