Question: who won the 7 man elimination chamber match?
Answer: Roman Reigns

Six matches were contested at the event , including one on the pre-show . In the main event , Roman Reigns won the first - ever seven - man Elimination Chamber match to become the number one contender against Brock Lesnar for the Universal Championship at WrestleMania 34 . On the undercard , Alexa Bliss retained the Raw Women 's Championship in the first - ever women 's Elimination Chamber match , and Asuka defeated Nia Jax to extend her undefeated streak and to keep Jax from being added to her WrestleMania 34 championship match . The event was also notable for Ronda Rousey signing her Raw contract , where she had a confrontation with Chief Operating Officer Triple H and Raw Commissioner Stephanie McMahon , which was the former 's first appearance since the night after Survivor Series .