For the uninitiated, when two rollerderby teams square off, it isn’t a game, set or match. It’s a bout! Local Jacksonville RollerGirls — including Fancy Schmancy (from left), Compton's Most Wanted and Meow Mix — present a rollicking doubleheader with the New Jax City Rollers facing Alamo City Rollergirls in a battle of all-star teams. Then, Magic City Misfits, from the RollerGirls’ brother league, look to derail the Carolina Wrecking Balls. Rollers at 6 p.m., Misfits at 8 p.m. April 20 at UNF Arena, 1 UNF Dr., Southside, $13 at the door, jacksonvillerollergirls.com.