Super Street Fighter IV

This achievment can actually be done with 2 players, making it a lot easier to boost if you desire to do so. If you set up a 2v2 match with 3 private slots and invite one friend in, you can start the match with just the 2 players present and if you win it will still count towards the achievement.
(tip courtesy of my friend Mark)

This achievement is slightly misleading to get this achievement you must beat at least one player on the other team. If you lose and your team mate wins the rest of the team battle it will still count for you.

I will give an example to make it a little easier to understand.

for this example we are going to a simple 2v2 match up

Blue team:
You
Your team mate

Red team:
Player 1
Player 2

Match up number 1 - You vs player 1

Winner = you

Match up number 2 - you vs player 2

Winner = player 2

Match up number 3 - team mate vs player 2

Winner = team mate

This will count towards your achievement as you beat one player and then still won the game.