I found a good way to get the following achievements all at once:
• Ranked Match
• 3 Ranked Streak
• 5 Ranked Streak
• 5 Ranked Matches
• 10 Ranked Matches
• 20 Ranked Matches
This is confirmed because I did it today with a buddy while boosting this game. You need 2 people to do this. You go to the play now menu and click ranked to get a ranked match. It’s been a lot easier to get matched up lately because of 2k11 being out. You have Player A quit out 19 consecutive times until Player B has 19 wins. Then on the 20th game you have to play the whole game and let Player B win. This will give Player B his 20th win and all the above listed achievements all at once. Then you just switch and have Player B quit out so that Player A can get the achievements.