Here are the results from the previous round:
Apocalypse vs. Aurora 4-2
Cable vs. Sabra 6-1
Nova (Richard Rider) vs. Magma (Amara Aquilla) 4-3
Sif vs. Chamber (Jonothon Starsmore) 5-2
War Machine (James Rhodes) vs. Sunfire 3-4
Boom-Boom vs. Silver Sable (Silver Sablina) 5-2
Sersi vs. Longshot 5-2
Sabretooth vs. Theresa Cassidy 3-4
You vote for the one who you like more, not who's the strongest one in a fight and have fun:
Nova (Richard Rider) vs. Sunfire
Apocalypse vs. Theresa Cassidy
Cable vs. Sersi
Sif vs. Boom-Boom