Dublin will host a London derby this summer as Arsenal and Chelsea meet at the Aviva Stadium.

It is one of the great ironies of football, but also a tribute to the pragmatism of Jose Mourinho, that the Europa League, a competition once much derided by Manchester United fans from their heady perch, today holds the future of their club so firmly in its grasp.

The Europa League is a Cinderella competition, usually neglected and often ignored, but tomorrow night in Stockholm, Cinderella might have a ball.