A "Wing-Back" is a position in soccer (football) that combines the roles of a defender and a midfielder. Wing-backs typically play on the left or right flanks of the field and are responsible for both defending against opposing players and supporting offensive plays. They often make overlapping runs to provide width and create crossing opportunities into the penalty area. Wing-backs are crucial in formations like the 3-5-2 or 5-3-2, where their ability to transition between defense and attack is vital. They need to possess good stamina, speed, and crossing ability to effectively contribute to their team's performance on both ends of the pitch.