Susanna Tapani scored her second overtime winner of the series to help Boston rally past Montreal 3-2 on Tuesday night and advance to the Professional Women's Hockey League championship series.

Boston has won five consecutive games, while Montreal ended the season on a four-game losing streak.

Tapani's game-winning goal came just 62 seconds into the extra period. Alina Muller cut back to the middle of the ice for a shot that bounced off the pad of Ann-Renee Desbiens and Tapani was left open at the back door for an easy tap in.

WATCH | Tapani's OT winner fires Boston past Montreal, into Walter Cup final:

PWHL Boston sweeps Montreal, becomes 1st team to ever advance to a Walter Cup final

Boston forward Susanna Tapani scores the overtime winner against Montreal in game three of the PWHL semifinals giving Boston a 3-2 win.

Five of the seven games between the two teams this season went to overtime, including the longest game in PWHL history at over 111 minutes on Saturday that Taylor Wenczkowski clinched in triple overtime.

Aerin Frankel, who set a PWHL saves record for a second straight game with a 56-save performance on Saturday, kept Boston in Game 3 after falling behind 2-0 in the second period. She finished with 32 saves.