Klay Thompson can fight.
Just ask one of the best boxers in the world -- WBO Junior Featherweight champion Nonito Donaire -- who's training the NBA superstar how to throw dem hands.
TMZ Sports talked to Donaire -- who's fighting Jessie Magdaleno on November 5th -- about footage of Klay training with N.D. recently at Top Golf in Vegas.
It's good news, bad news for Thompson ... who Nonito says has tons of natural athletic ability. So, what needs work? Hint, Klay ain't Mike Tyson .