The Royal Rumble match generally features 30 wrestlers. Traditionally, the winner of the match earns a world championship match at that year's WrestleMania. For 2021, the men and women could choose which world championship to challenge for at WrestleMania 37; the men could choose Raw's WWE Championship, SmackDown's Universal Championship, or the NXT Championship, while the women could choose the Raw Women's Championship, SmackDown Women's Championship, or NXT Women's Championship.
