AtRingside on Instagram: "Thomas Hearns vs Marvin Hagler wasn’t just a fight — it was controlled chaos. Two legends. One round. Zero hesitation. From the opening bell, Hearns brought pure speed and snap, firing straight rights like missiles, while Hagler marched forward with granite composure, willing to absorb damage just to land something heavier back 🔥🥊 The first round is often called the greatest in boxing history for a reason. No feeling out. No defense-first mindset. Just v