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MILAN, ITALY - FEBRUARY 26: Manager Ronny Deila of Celtic looks on during the UEFA Europa League Round of 32 match between FC Internazionale Milano and Celtic FC at Stadio Giuseppe Meazza on February 26, 2015 in Milan, Italy. (Photo by Jamie McDonald/Getty Images)

MILAN, ITALY - FEBRUARY 26:  Manager Ronny Deila of Celtic looks on during the UEFA Europa League Round of 32 match between FC Internazionale Milano and Celtic FC at Stadio Giuseppe Meazza on February 26, 2015 in Milan, Italy.  (Photo by Jamie McDonald/Getty Images)