Roman Reigns won his first WWE World Heavyweight Championship at Survivor Series 2015, after defeating Alberto Del Rio and Dean Ambrose in the semi-final and final of the WWE World Heavyweight Championship tournament. The Big Dog survived the 16-superstar tournament to claim WWE’s top title, which had been made vacant after Seth Rollins suffered a right ACL, MCL, and meniscus tear at a WWE live event in Dublin a few weeks prior.