For this achievement you will need to be somewhere around the top 20% of the monthly leaderboards. You will need 500+ rank points in order to be ranked around 10,000. If you only play 2 games and win both, there is a good chance you could have enough points. Boosting against the same account for 5 games will get you a little over 100 rank points, but after 5 games you will be getting 0. You can check rank points by viewing the HUT monthly leaderboards. Luckily if you qualify at the end of the month, your done. The achievement unlocks right in the playoff menu. But if you miss it, you MUST wait until the next month to try again.