BBC Sport - Celtic manager Ronny Deila says referee had a 'bad day at work'

San Siro ref had a bad day - Deila

Celtic manager Ronny Deila speaks to the media after his side's 1-0 loss on the night and 4-3 aggregate defeat to Europa League opponents Inter Milan.

Virgil van Dijk was sent off in the first half for two bookings and the 10 men succumbed to a late Fredy Guarin goal for Inter.

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