There were rumors online that they bladed, which is NOT true at all. WWE issued this statement the night after WrestleMania 31 about Brock Lesnar bleeding in his match with Roman Reigns.
“WWE programming is TV-PG and we don’t permit intentional bleeding. The communication or contact between our performers and referees is part of our safety protocol. That said, unintentional blood sometimes occurs, and we do our best to minimize.”