Don't use a HUD, so can't supply the numbers many are probably looking for. Villain is a better player than hero, winning for sure. Good postflop.

Pot amounts are pre-rake.

Hero ($10.17) in MP is dealt AK and opens for $0.30.
Villain ($10.27) in CO reraises to $1.15. Rest fold, hero calls.
Flop ($2.45): 239. Check, villain bets $1.16, hero calls.
Turn ($4.77): 3. Check, check.
River ($4.77) 2. Hero bets $2.90, villain tanks until his time is almost out and min-raises to $5.80

Not sure if river bet OOP was a good idea. At the time I was thinking I was up against TT-QQ, AK, AQ-Ts, KQ-Ts, although I've seen him 3bet pre even wider on the BTN and in the blinds (AQo). It's close, 22 hands that beat me or chop vs 18 that I beat. Heavily dependent of course on that range which might not be accurate. Also, I'm repping 99 specifically, which is probably not a good idea since I'll always have enough bluffs for him to call.

But the raise seems sketchy to me. Does he think 77 or 88 will call? Could also be one of the hands I beat trying to get me to fold.

if your opp is not a nit, 4b pre
you can prob c/f flop
x river, you're trying to get to showdown

just fold

Check/ call river.

What was your reason for betting river?