In modern football there are usually two strikers on each team, either playing alongside each other as out-and-out strikers or with one of them tucked in just behind the other, in the so-called "hole" (between the opponents defence line and midfield).
In modern soccer, teams usually have two primary attacking players on the field, often playing together as a single unit or with one player supporting the other from a more central position, creating space in the "hole" between the opponent's defense and midfield.