The Manchester United manager feels the Magpies are being analysed more thoroughly by opponents and says that injuries are also to blame for their recent poor formSir Alex Ferguson believes that Newcastle United have lost the "surprise" factor that saw them flirt with the possibility of Champions League football last season in a strong Premier League campaign.
Alan Pardew’s side finished fifth in the table in an impressive season which saw the former West Ham man take home the League Managers Association and Premier League Manager of the Year awards.
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"The new players they brought in caught us all by surprise," Sir Alex told reporters.
“We didn't really know a lot about them. I knew about [Demba] Ba, of course, but I didn't know anything about [Yohan] Cabaye or [Papiss] Cisse, to be honest with you.
"They had fantastic seasons. Second time round, clubs are starting to analyse them a bit different, plus, more importantly, he's [Pardew] had some injuries.
"Cabaye's out till next year, [Cheikh] Tiote is out to next year, he's had one or two important players injured and that does make a difference when you've not got a squad as strong as the likes of ourselves or [Manchester] City or Chelsea.
"I'm not entirely surprised [by their form], although I am surprised they are so low down the table."