The best way to get this achievement is during the first year of Career mode.
Prior to competing in the Australian Open you should play the minor tournament (as opposed to the training or exhibition match), to get yourself used to the gameplay.
In the first year, winning a tournament is extremely easy. To start with, serve four double faults to have your service broken. To win on your opponents serve, simply hit it deep to the corner that your opponent is serving from. As soon as you hit the ball, you should immediately run to the net; so, when the return shot is hit, it is a simple volley into the open side of the court. Use this tactic four points in a row and the achievement should pop.