This unit covers defending, challenging, and interception (DCI) in soccer. The three learning outcomes are individual, small group and team defending; blocking shots and passes to gain possession; and sliding tackles to gain possession. Effective DCI requires making up ground as the ball travels, slowing down the attacker's first touch, preventing them from turning or passing forward, being patient and staying on your feet. When defending in pairs, the nearest player marks the ball while communicating with their partner about supporting distance, angles of support, and maintaining balance and cover.