The NHL has already extended the regular season an extra day to fit in a Florida Panthers-Boston Bruins game from January that was postponed by a storm - and there could be another game to be added.

The league announced Friday that the fourth tiebreaker in a battle for a playoff position is a tiebreaking game, with playoff rules overtime - a scenario that could happen between the Panthers and Philadelphia Flyers, battling for the final Eastern Conference playoff spot.

The first three tiebreakers are regulation and overtime wins (ROW), points in their season series (excluding the first home game for the team that has the extra game), and goal differential for the season.

Should the Flyers lose their final game of the regular season to the New York Rangers by two goals, and the Panthers win their final two games of the regular season in shootouts, a tiebreaking game will be needed.

The tiebreaking game would be played on Tuesday, April 10, with a draw to determine home-ice advantage taking place after the Panthers game against the Bruins Sunday.