The first step you should take is in the Team Editing menu, before the match even starts. Designate a formation that encourages offense over defense, like 4-3-3 Attack, 3-5-2, and 4-2-4, all of which load the midfield and attack sides of the field with players. These can strengthen your offensive game, but you'll have to ensure the opposing team doesn't capitalize on weak areas of your defense.