Full-backs are defensive players in soccer who primarily operate on the left and right flanks of the field. Their main responsibilities include blocking opposing wingers, preventing crosses, and supporting the central defenders. Full-backs must possess good speed and stamina, as they often cover large areas of the pitch. In addition to their defensive duties, full-backs are also expected to contribute to the attack. They frequently overlap with wingers and provide width to the team's formation. This dual role makes them essential for both defense and offense, helping teams maintain balance during a match.