It’s a potent one-two punch that will send collectors reeling: On February 21 in New York, Heritage Auctions will present both sets of gloves from the second heavyweight championship boxing match between Muhammad Ali and Sonny Liston, in 1965. The gloves will be offered as a single lot, just three months shy of the fight’s 50th anniversary. The unique offer arises from unique circumstances. Usually after a bout, the gloves are returned to the boxers themselves or their trainers. But after Ali threw his controv…