Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Igor Kralevski (born 10 November 1978 in Skopje) is a Macedonian footballer currently playing for FK Metalurg Skopje. Within the sport of association football, a defender is an outfield player whose primary role is to prevent the opposition from attacking. There are four types of defender: centre back, sweeper, full back, and wing back. The centre back and the full back positions are essential in most modern formations. The sweeper and wing back roles are more specialized for certain formations.