In a perfect world, Newcastle United sign Marc Guehi in January after failing to land him in the summer. The Magpies committed so much time towards trying to sign Marc Guehi, with Paul Mitchell trying desperately to strike a deal with Crystal Palace. Ultimately, Mitchell was unable to sign Guehi. Newcastle ended the summer without a new right-sided centre-back, and that continues to plague Eddie Howe’s side. It was evident over the weekend why Newcastle still need Guehi. While he was impressing in a Crystal Palace shirt, the Magpies’ lack of pace at centre-back was being exposed once again. Wi…