There is a reason Jose Mourinho has never lost a home game to Arsenal, during his career in English football.
True, by the time he came here, Arsenal were on their way down from a lofty summit, and his first Chelsea team made sure that trajectory continued. Equally, thought, he has faced them in the years when Arsenal teams often find ways to lose.
Poor investments, players lacking the necessary resolve; Mourinho's experience is of the soft-centred Arsenal and it was much the same yesterday.
Arsenal played the brighter football, had some reasonable opportunities, but lost their way in the second-half - as did the game - and fell to a set piece sucker punch with nine minutes remaining.