One of the first live MTTs I played. I'm no MTT reg :)
€200 2-day Live MTT (around 400 players)
25k starting stack with 45 min levels

Early stages, Blinds were 250/500 and I had 25k left.

UTG(~25y/old German) was chipleader at the table with around 60k and was playing pretty aggro. I've seen him open 76o & 64s UTG and he has shown a lot of bluffs.
UTG+3(~35 y/old prolly Irish) is unknown & just sat down at our table. He had around 35k.
I'm in SB. I haven't shown down a hand and I've 3bet a couple of times but everybody folded.

My hand A9o

UTG raises to 1200, UTG+3 calls, I squeeze to 3700. Both call.

UTG was opening really wide and was folding a lot to 3bets so I decided to squeeze with the A-blocker.

pot (~12k)
Flop: AQ5cc
I check, UTG checks, UTG+3 bets 3.2k, I call & UTG folds

Going for a x/c to let UTG barrel and I have one of the worst Ax I would 3bet so I don't have 3 streets.

pot (~18.4k)
Turn: AQ5cc Ao
I check, UTG+3 checks

pot (~18.4k) (I have around 19k left)
River: AQ5cc Ao 2o
Hero??

Do we have a valuebet here? I doubt a lot of worse is calling but I can't really x/c and a x/f seems really weak.

Your opinion please :)