Hero (BB): 110 BB
CO: 138.9 BB (VPIP: 18.35, PFR: 14.81, 3Bet Preflop: 7.14, Hands: 112)
BTN: 107.1 BB (VPIP: 21.56, PFR: 16.77, 3Bet Preflop: 6.15, Hands: 175)
SB: 89.5 BB (VPIP: 100.00, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 1)

SB posts SB 0.5 BB, Hero posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has Ts 9d
fold, BTN raises to 2.1 BB, fold, Hero calls 1.1 BB

Flop : (4.7 BB, 2 players) Tc Ad 9c
Hero checks, BTN bets 2.5 BB, Hero raises to 10 BB, BTN calls 7.5 BB

Turn : (24.7 BB, 2 players) 8s
Hero bets 17 BB, BTN calls 17 BB

River : (58.7 BB, 2 players) Jd
Hero checks, BTN bets 37.5 BB, fold

So my question is with what is he calling check raise on flop I think sth. like this : ATo (6com)/AcXc/QcJc/...I think with sets he woild stack off and also some 8c7c. I am really lost here would he call 77 till the river to hit his straight. Did he got there with QcJc ?? I did some range analyzing and I was ahead of his range with my two pair. Was it ok to check raise the flop here? I think I should call this river given how the hand was played... What do you guys think? Thanks in advance =)