Boxing legend Mike Tyson's biggest regret in life is refusing to smoke weed with late pal Tupac Sakur before he died.

The former professional fighter struck up a close friendship with the hip-hop star in the early 1990s. Shakur would often offer marijuana to Tyson, but the sportsman feared boxing officials would find out about his smoking habit if he indulged.

Now the retired world champion regrets not bonding with the rapper over a joint. Tyson tells the Associated Press, "He always wanted me to smoke weed with him, and I never did it, and I wish I did. That's my biggest regret."

Shakur was gunned down and killed in Las Vegas in 1996 after watching Tyson in a fight. (KD//ZN)

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