If you're having issues hitting Green Release shots mid game an easy way to get this achievement is with free throws. Set up a game against another controller in quick play while choosing a team that has great/good free throw shooters. When the game starts get the ball to the player you want to shoot free throws with and with the second controller hit and hold X. The opposing player should run over to intentional foul your player. Continue doing so and the second controller's team will end up in the penalty meaning that every foul from this point forward with get you to the line where you can continue to shoot free throws until you get your ten Green Release shots. If you miss, no worries. Let the second controller sit there if they get the rebound or if they have to inbound the ball. After 5 to 8 seconds, they'll get a penalty and turn the ball over where you can have the opposing team intentionally foul you once more.