Immerse your football in a bucket of water and turn it slowly. Look for the place where a steady stream of small air bubbles is emerging from your ball. This is where the football is punctured.
Fill your repair syringe with ball sealant. Insert the tip of the syringe into the ball valve. Depress the syringe, emptying its contents into the ball.
Insert your football pump tip into the ball valve. Pump a few times to replace any lost air in the ball. Pound the ball vigorously against a grassy patch of ground. Focus your pounding specifically on the area where your ball has been punctured.
Continue with your game, as the ball is repaired and ready for use.