First you may want to put this in the tourney strat threads listed under tournament poker. You are also gonna want to distinguish what is the buy in, if your in the money, etc.
Here
I don't see why he can't have 99 or JJ in this case either. I would also lean against him having a10. So at best case you are chopping (he has AQ) and at worst you are crushed by sets, two pair, and ak.