This is a lot easier if you pay the 4.99 to unlock everything in the game as I did that right off the bat. If you do you can use xXCorrado80Xx's solution from FIFA 13 (WP) to get it.
Basically in the tournament or manager mode before you start a match you can simulate it. Once you get around the 85th minute (after the 87th minute it will become greyed out), hit the arrow in the top right hand corner to "intervene" and it will give you credit for playing a match. Rinse and repeat for the achievement. Took me about 3 hours to do this.
If you don't pay the 4.99, you will have to play 100 matches outright. At a minimum that would take you 400 minutes of match time (2 minute halves) or almost 7 hours. Of course this isn't including stoppage time, loading times, ect.
Your choice, enjoy :)