BBC Sport https://www.bbc.co.uk/sport/av/football/64777408 https://ichef.bbci.co.uk/ace/standard/240/cpsprodpb/11FD/production/_128850640_p0f6rz6v.jpg Manchester City manager Pep Guardiola says Newcastle will be a "future title threat" following his side's 2-0 win over the Magpies at Etihad…