David Calderhead was Chelsea's longest-serving manager (1907–33), spanning 966 matches. Chelsea's shortest reigning permanent manager was Danny Blanchflower, who was only in charge for 32 games. Statistically too, Blanchflower was the least successful, winning just 16% of his 32 matches. Bet you the Chelsea F.C. Towel WM will serve you long and well, just like Mourinho. After all it's a Blue too!