min raises, especially on the turn, scare me. I'd dump it right there and assume you were up something big like AJ or a set. And if he limped w/ an ace UTG his kicker is surely better then a 7, logical guess is AT maybe A9s. If he raised w/ nothing on the ace to try and scare you he did a good job, I don't think u'll see that a lot tho in that tournament.