a knockout blow
Not until this tournament gets to the knockout quarter-final stages will the real competition get under way.
On the other hand, a fighter who is not known as a knockout puncher can be very strong physically.
The last event was the traditional tug-of-war, in which a round robin knockout decided the winner.
At the Games there will be eight teams in each competition battling it out in pools, followed by the knockout rounds.
Yesterday, with a hard-won victory over Mexico, he took them as group winners to the knockout stage of the World Cup for the first time in 40 years.
While Jellicoe was criticised at the time and failed to achieve the knockout blow that was within his grasp, he nonetheless succeeded in neutralising the German naval threat for the remainder of the war.
Bernard is a very good puncher, although he is not considered a one-punch knockout artist.
The men will be split into four pools of four with the top two from each group going through to the quarter-finals, from where it will be a straight knockout tournament.
Had Ali fought anyone except Joe Frazier that night, he would have been a knockout winner.