Focus on individual needs of the soccer player........
Soccer is a team game but the individual is a vital component in the team's success.
When training as a team, a players individual needs can be overlooked so 1 on 1 soccer training can help significantly. Working 1 on 1 is a blank canvas and the training can be specifically tailored to focus on areas which needs works.
Most often this is around technique, flexibility, speed, agility and power with and without the ball.