Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Miguel Andrés Ponce Torres (born 1971-08-19 in Santiago) is a retired football (soccer) defender from Chile, who made his debut for the Chile national football team on 1991-04-09 in a friendly match against Mexico. He obtained a total number of eighteen caps during his professional career. 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.