This achievement requires that you win a game on the hardest difficulty setting, World Class. To change the difficulty, from the Main Menu, click on Help and Options. Now in the bottom left corner, you will see a blue button for Options. Click that. Then go to Game Settings and change the Difficulty Level to World Class. This difficulty is challenging if you are using two evenly-matched teams. However, in Quick Play, you have the option to play as a 5-star team against a 1-star team. Example: Match up Manchester United (Barclays PL league) against Admira (A. Bundesliga league). This will basically be like playing on Beginner and you should be easily able to win. The achievement will unlock at the end of the game.