UFC Undisputed 2010

the easyest way i did this was to make two default custom characters from CREATE A CHARACTERS, career fighters do not count, put tem both in a match use one and win and theres your achievement, you may also get the puppeteer achievement if you have'nt made a custom character yet

hope this helps
Jake
o0 JdogJ 0o

I never managed to get this in career mode so I did it in an exibition fight on beginner difficulty this shouldn't be too difficult against any opponent