[robinmbuk]

Don't wait for the river. I presume you didn't raisethe flop because his chances of out drawing you were so slim, and if he has AK he needs a chance to catch up.

When he fires again on the turn, he is either double barrelling with nothing or has a hand he likes (or he could have AK / AQ of diamonds.... he has alot of outs with both those hands. You need to try and get as much money in the pot as possible on the turn. If he has missed overs he will fold, If not you might stack him.