The argument that Chancel Mbemba and Jamaal Lascelles would improve playing alongside Fabricio Coloccini is no longer valid. The Argentine's form has diminished rapidly (aside from a few decent cameos) over the past two years and a stronger argument is that Mbemba would benefit from being the prime leader of the back four. Coloccini's pace, marking and aerial ability is no longer at the standard where he can lead the line and, although offering vital experience, he will struggle to maintain a first-team place over the entirety of a Premier League campaign. Newcastle would make further progress if they were to sell the 33-year-old and sign a commanding centre-half who is strong in the air and could form a solid partnership with the Magpies' new Congolese signing.