At the Olympics, boxing is judged on points, with fights lasting a maximum of four rounds, each two minutes long.
Five judges watch the bouts and each press a button when they think a fighter has landed a clean blow. If three press their button at the same time the fighter scores a point.
The fighter with the most points at the end of the bout wins.
At the Olympics boxers must wear headguards to protect them. Boxers must also be
amateur, which means they aren't allowed to be paid to fight.
Only men are allowed to box at the Olympics.
Who are the British hopes for Athens?
There is only one, 17-year-old Amir Khan. He is the only British boxer going to the Games.
However, he is very highly thought of, and has the ability to challenge for a medal.
Who are likely to be big stars?
The Cubans, all the Cubans. They always have a really strong boxing team at the Games, largely because Cuban boxers do not turn professional.
That means they are much more experienced than boxers from other countries. Some having fought hundreds of bouts, with some fighting at more than one Olympics.
The US also normally does very well, but at the Sydney Games they didn't win a gold medal, for the first time ever.
Only three fighters have ever won gold at three Olympics in a row; Russia's welterweight champion Oleg Saitov hopes to become the fourth in Athens.