[TStoneMBD]

this is an interesting hand. the only holding i can put him on is KQ/JT or trying to take a shot at you with the intention of folding to more pressure. he could have also opted not to cap with a big pair. rainbow board, its not like hes raising J9 for a free card, but he might be raising a AJ/KJ type hand with the intention of taking a free card for a cheap showdown with a gutshot.

so calling the raise and betting the turn looks good, but even with that line you might lose Ax all together as he might just muck it. although, i dont think he should be raising Ax on that board unless its AJ or AT trying to take a free card.

so i say call/donk unless you put him on a pair+gutshot as his most likely holding then i would 3bet the flop and bet turn.