T9s trips river fold

[Spy Dog]

Once the CO coldcalls 2 bets on the flop I would put him on a flush draw or 9 (and maybe 33). I strongly lean towards a flush draw since a 9 would probably just cap it. I doubt that UTG will suddenly check the turn after raising preflop and 3-betting the flop. So, I think I want to see a non-diamond turn and try to CR the field instead of 4-betting the flop and leading the turn.

Another alternative is to call the 3-bet and donk a non-diamond turn and hope that UTG will raise so you can 3-bet.

Once the diamond hits on the turn you are just praying that CO somehow has 98 or 97 because that's generally all you beat on that turn based on CO's flop action. Therefore, it's probably best to check-call 1 bet on the turn and fold if it goes bet-raise.

Also, keep in mind that UTG could be on a flush draw based on his flop action, further reducing your chances of being ahead when this turn card hits.