Opponent min-bets river and I have TPTK

Lambert180

I aint seen this player before or if I have, I've never played any memorable pots with them so had no reads (although I do now after this hand). Am I fine to go for 3 streets of value here? How do you react to the river min-bet if you're readless.

What dya think he had? I'll tell you what he had after some answers.

Player	Action	Cards	Amount	Pot	Balance
psycho16	Small blind		£0.02	£0.02	£2.01
Lambert180	Big blind		£0.04	£0.06	£3.98
	Your hole cards	A K
donald1992	Fold
redjk99	Fold
Moyle	Fold
lufc333	Fold
psycho16	Call		£0.02	£0.08	£1.99
Lambert180	Raise		£0.16	£0.24	£3.82
psycho16	Call		£0.16	£0.40	£1.83
Flop
		Q 7 A
psycho16	Check
Lambert180	Bet		£0.30	£0.70	£3.52
psycho16	Call		£0.30	£1.00	£1.53
Turn
		2
psycho16	Check
Lambert180	Bet		£0.75	£1.75	£2.77
psycho16	Call		£0.75	£2.50	£0.78
River
		6
psycho16	Bet		£0.04	£2.54	£0.74
Lambert180	Raise		£1.98	£4.52	£0.79
psycho16	All-in		£0.74	£5.26	£0.00
Lambert180	Unmatched bet		£1.20	£4.06	£1.99
psycho16	Show
Lambert180	Show	A K

Wilhelm

3 streets of va1ue against that stack is a must.  Did he have A6 again?

Edit: set of As be my second guess

grantorino

Next hand pls