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"): Brisco is considered one of the top wrestlers of his era; in 2005, Don Leo Jonathan called him "probably the greatest champion of the 20th century."
Relevant evidence: Yes