World Wrestling Entertainment star The Undertaker was hospitalised following a fight at WrestleMania XXX on Sunday.
The pro wrestler, whose real name is Mark William Calaway, was injured during a bout with Brock Lesnar at the New Orleans, Louisiana event, which he lost - and had to be taken to a nearby hospital.
WWE officials told TMZ.com that after undergoing a variety of tests, doctors concluded that the 49 year old had suffered a severe concussion and was required to stay overnight for further evaluation.
He was released on Monday.
