As it often does, hockey fever has reached into the highest offices of the cities involved.
Montreal's mayor Denis Coderre spoke on speakerphone with his Boston counterpart Marty Walsh to place a bet.
He told Walsh if Montreal wins, Walsh will have to wear a Habs jersey and fly the Canadiens' flag over Boston City Hall for a week.
Coderre will have to do the same if the Bruins win the series.
The losing mayor will also have to visit the winner's city.
Coderre said in a statement that he can't wait for the Boston mayor to visit Montreal, saying sports represents "the beginning of a great friendship and partnership."