THE BLOCK TACKLE - Winning Defensive Skills for Ages 6-9. Kristy Hartofilis, a former professional player and USA national team coach, demonstrates a soccer drill to master the basics of the standing tackle and winning possession. Two players tackle the ball at the same time, both making sure they don't let it get past their foot. Next, Kristy explains a variation teaching one player to roll the ball over their opponents foot, ensuring they come out of the 50/50 challenge with possession of the ball. Being prepared for a 50/50 challenge greatly helps a team both win and retain possession, and practicing the situation also helps a player learn to approach it correctly and reduce their risk of injury.