Watch ex-Celtic boss Ronny Deila strip to his underwear and do push-ups after New York City’s MLS Cup win

Ronny Deila stripped to his underwear and did push-ups as he celebrated leading New York City FC to the MLS Cup. The ex-Celtic boss, 46, was left in tears after a dramatic penalty shootout victory over Portland Timbers. Deila spent two seasons at Celtic from 2014, winning three trophies during his stint in Scotland...