Diego Costa on target as Chelsea extend lead to eight points with win over Hull

For a figure as volatile as Diego Costa, there was something distinctly predictable about all of this. The Chelsea striker had been offered an immediate return to the starting lineup after an unsettling period disrupted by lower back spasms and Chinese whispers, and ultimately that absence at Leicester last weekend. Yet here he was departing four minutes from time with the majority in this arena chorusing his name, to be greeted by a thumped hand clap from Antonio Conte on the touchline, as the