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GLASGOW, SCOTLAND - OCTOBER 02: Celtic Manager Ronny Deila looks on during the UEFA Europa League group D match between Celtic and Dinamo Zagreb at Celtic Park on October 02, 2014 in Glasgow, Scotland. (Photo by Mark Runnacles/Getty Images)

GLASGOW, SCOTLAND - OCTOBER 02:  Celtic Manager Ronny Deila looks on during the UEFA Europa League group D match between Celtic and Dinamo Zagreb at Celtic Park on October 02, 2014 in Glasgow, Scotland. (Photo by Mark Runnacles/Getty Images)