To unlock this quickly, ensure your game settings are changed to one round only - you may not win the first round, and thus have to play 2/3 times before unlocking, but it is the quickest way to ensure an overall match victory. If, for example, you have 'first to 500' as your match condition, it can take an hour to reach, and you're not guaranteed to win. A nice, quick, one-round game is all this achievement can take.