Roma performed brilliantly throughout the final match between Sevilla vs Roma. But their misfortune is a suicide goal. Had it not been for the own goal in that match, Roma would have won the UEFA Europa League title. Roma equalize with Sevilla through own goal.  And in the end Roma were badly beaten on penalties. 
I mean anything can happen in the final match. That is, even if Manchester City is ahead throughout the entire game, if such an unexpected event happens at the last minute, then there is a possibility that we will lose the bet, so I am reluctant to bet win or lose because of this fear.