Odds of this?

[macawboy]

About a couple of months ago i asked the odds of being dealt AAxx and thanks to all that contributed to the answer (about 1 in 40).
Suppose i am in a full ring game(9 players)under the gun i am dealt Axxx can any one tell me the odds of comeing up against AAxx?My first thought was about 1 in 5.
40 divided by the 8 players left but because i hold one of the Aces surely this can,t be right?
Any formulas to work this one out?