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 contemporary football, each team typically has two main forwards, either working together as dedicated attackers or with one player positioned closer to midfield, filling the gap between the opposing defense line and midfield.