Like a goalie, cover more of your net by moving forward to cut off angles. In
soccer, the closer the goalie is to the shooter, the more of the shooter's possible angles into the goal the goalie can block. In tennis, the farther forward you are at net, the wider the area of court you take away from your opponent's passing shot. In both sports, though, you have to be careful not to move too far forward while the opponent still has the option to send the ball over you.