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"): He performed for various territories of the National Wrestling Alliance (NWA), becoming a two-time NWA World Heavyweight Champion, and multi-time NWA Tag Team Champion with his brother Gerald Brisco.
Relevant evidence: No