JAMIE CARRAGHER noticed something he had “never seen before” when analysing Liam Rosenior tactics in Chelsea’s first leg Carabao Cup loss to Arsenal. The Sky Sports pundit spotted that Welsey Fofana, the team’s left centre-back, was following midfielder Martin Odegaard around the pitch. When discussing Rosenior’s tactics on Sky Sports, he said: “The man-to-man marking…