![Boxing History on Twitter: "Muhammad Ali, then Cassius Clay, hits the heavy bag ahead of his first bout with Sonny Liston in 1964 (Credit: Slade Paul) # boxing #history https://t.co/PyyCyNALhc" / Twitter Boxing History on Twitter: "Muhammad Ali, then Cassius Clay, hits the heavy bag ahead of his first bout with Sonny Liston in 1964 (Credit: Slade Paul) # boxing #history https://t.co/PyyCyNALhc" / Twitter](https://pbs.twimg.com/media/E6RU5E9UYAE2bsk.jpg)
Boxing History on Twitter: "Muhammad Ali, then Cassius Clay, hits the heavy bag ahead of his first bout with Sonny Liston in 1964 (Credit: Slade Paul) # boxing #history https://t.co/PyyCyNALhc" / Twitter
![Heavyweight History on Twitter: "The great Joe Louis holds the heavy bag for the ever dangerous Sonny Liston, circa 1963. You're looking at two of the all-time most deadly punchers right here. Heavyweight History on Twitter: "The great Joe Louis holds the heavy bag for the ever dangerous Sonny Liston, circa 1963. You're looking at two of the all-time most deadly punchers right here.](https://pbs.twimg.com/media/FUpc7PUXoAE4ehY.jpg)
Heavyweight History on Twitter: "The great Joe Louis holds the heavy bag for the ever dangerous Sonny Liston, circa 1963. You're looking at two of the all-time most deadly punchers right here.
![Sonny Liston working out on the heavy bag while Joe Louis holds it, 4/13/65 CSU Archives/Everett Collection Stock Photo - Alamy Sonny Liston working out on the heavy bag while Joe Louis holds it, 4/13/65 CSU Archives/Everett Collection Stock Photo - Alamy](https://c8.alamy.com/comp/BTJY4E/sonny-liston-working-out-on-the-heavy-bag-while-joe-louis-holds-it-BTJY4E.jpg)
Sonny Liston working out on the heavy bag while Joe Louis holds it, 4/13/65 CSU Archives/Everett Collection Stock Photo - Alamy
![Heavyweight champion Sonny Liston sharpens his punching on a heavy... Foto di attualità - Getty Images Heavyweight champion Sonny Liston sharpens his punching on a heavy... Foto di attualità - Getty Images](https://media.gettyimages.com/id/515349852/it/foto/heavyweight-champion-sonny-liston-sharpens-his-punching-on-a-heavy-bag-during-his-training.jpg?s=1024x1024&w=gi&k=20&c=Oj9QnkjHZ73zzPKmTJOVIOcer40zFqGkYHv543UOrDI=)
Heavyweight champion Sonny Liston sharpens his punching on a heavy... Foto di attualità - Getty Images
![Amazon.com : Banger - Muhammad Ali vs Sonny Liston Knock Out Punch Motivational Inspirational Office Gym Dorm Wall Decor Design on a 3X5 Feet Flag with 4 Grommets for Easy Hanging. Authentic Amazon.com : Banger - Muhammad Ali vs Sonny Liston Knock Out Punch Motivational Inspirational Office Gym Dorm Wall Decor Design on a 3X5 Feet Flag with 4 Grommets for Easy Hanging. Authentic](https://m.media-amazon.com/images/I/71QXXcup-kL._AC_UF894,1000_QL80_.jpg)