First of all thank you for your prompt reply. I feel obligated to elaborate on what I was trying to say and I do not expect an answer, but if you feel you need to add sth or comment I would be very happy and grateful
1st. turn min 4bet might me theoratically wrong, but gives us a lot of information. The board is such that he might have a flush draw he's raising you with, he might have a pair and a gutr for example J7 suited or 10,7 suited or he might have the nuts. Calling the turn is probably theoretically correct, but leaves you in the dark on the river bluff (which I think will come almost 100% on this board) on practically any card.
On the other hand if we reraise him to ,say, 25, I believe the only hand he'd be shoving in here is the nuts (considering the way the match has developed so far) so we can easily fold. A mixture of information, protection and value reraise
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2nd I agree that a weaker ace would not reraise here, but...if the flop was 7,K,A and you checked the flop behind, then, yes, he would bet the turn with an ace almost always. But some people simply don't donk bet or they do so very seldomly, so, I believe these people would check call this card (ace on the turn) as a standard. Check raise probably not, I agree, but might not be such a bad move, after all you folded A,10
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3rd somebody proposed this idea (in the previous comments) about calling his turn raise and bluffing any flush card on the river. I wanted to stress out I thought that was wrong from several reasons. You aren't too deep, so with a straight, he would click call almost always. I feel you would need a deeper stack to be able to put some serious pressure on him. And also at low stakes, this never works.
4th his timing is the main factor which makes me want to continue with the hand, because I think it's one of the most important tells in online hu matches.