Question: Sydney Mervin "Merv" Batt was a frequent opponent for many foreign wrestlers travelling overseas including NWA World Heavyweight Champions such as one who was called, "probably the greatest champion of the 20th century." by who?
Sentence (from "Jack Brisco"): Freddie Joe "Jack" Brisco (September 21, 1941 – February 1, 2010) was an American professional wrestler.
Relevant evidence: Yes