25-50 NL Trips river decision

[Ikke]

25/50NL, 10-handed.

I raise UTG+1 with Th8h, and only the button calls. I have 6k and he has me covered. So far I have seen one hand where he called in position the whole way on a low board where his opponent kept betting into him with AA (last bet was all-in call). He had a set there.

The flop is TT7 rainbow. I bet 200 in a 375 pot. He calls.

Turn is 5 (no fd), I bet 600 he calls.

River is the 9. I bet 1300, he goes all-in and I have about 3800 left.

Comments on the whole hand, especially river play?

Thanks