In professional boxing, the maximum number of rounds is 12.

Boxers wear gloves, headgear, and a mouthguard to protect themselves from injury.

A knockout is when a boxer is knocked down and unable to continue fighting.

A unanimous decision is when all three judges score the fight in favor of the same boxer.

The World Boxing Council (WBC), World Boxing Association (WBA), International Boxing Federation (IBF), and World Boxing Organization (WBO) are the four major governing bodies for professional boxing.

Muhammad Ali is widely considered to be the greatest boxer of all time.

The Thrilla in Manila is considered to be the most famous boxing match of all time.

A combination, flurry, and barrage are all terms for a series of punches thrown in rapid succession.

A slip, duck, and counterpunch are all terms for the technique in which a boxer ducks under an opponent's punch and counters with a punch of their own.

Bobbing, weaving, and head movement are all terms for the technique in which a boxer moves their head to avoid an opponent's punch.

A cross is a punch thrown with the back hand.

A jab is a punch thrown with the lead hand.

An elbow is a punch thrown with the elbow.

A shoulder is a punch thrown with the shoulder.

A headbutt is a punch thrown with the head.