Press [Esc] after your fighter has been knocked down.
The best moves to use are upper cut, round house, low
leg kick. The low leg kick is useful for keeping your
opponent out of range and on target for a round house
followed by an upper cut. The double backfist is also very
powerful and often provides a knockout punch. If you are
losing a fight, and don't have much chance of recovery,
then press the 'ESC' key so that your stats remain intact.