Max out your speed first, then your strength. This helps in the matches because all you have to do is keep throwing hooks, then when your opponent is dazed, use your Super Punch to knock him down. After you have maxed out speed and strength, you should be able to defeat all of your opponents with ease using hooks.
When your opponent is approaching you at the beginning of the initial fight use your special power punch which will stagger him. When he approaches you again hit him with another special power punch and then attack him with a combination of body punches. Keep attacking him and his strength will then drop until you have knocked him out