Jakub Lauko scored the winner with 54 seconds to go in regulation as the Rouyn-Noranda Huskies beat the Halifax Mooseheads 4-3 in the final round-robin game of the Memorial Cup.
Halifax (2-1) still gets a direct entry into the tournament final on Sunday by winning the tiebreaker between the three teams with 2-1 records.
The Huskies (2-1) and Ontario league champion Guelph Storm (2-1) meet in Friday's semifinal.
The Western league champion Prince Albert Raiders (0-3) were eliminated Tuesday.
Felix Bibeau, Joel Teasdale and William Rouleau also scored for the Quebec league champion Huskies.
Benoit-Olivier Groulx, Arnaud Durandeau and Antoine Morand scored for the host Mooseheads, while Alexis Gravel stopped 34 shots.
Wednesday's game was a rematch of the QMJHL final that Rouyn-Noranda took in six games, and there was no love lost between the two clubs.