Villain is 19/13 and folds to bet 40% (only have 142 hands). Notes are he has 4bet TT.

PokerStars - $0.02 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4: http://www.pokertracker.com

BTN: 315.5 BB
SB: 199.5 BB
BB: 116 BB
UTG: 102 BB
MP: 298 BB
Hero (CO): 100 BB

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has Ad As
fold, MP raises to 3 BB, Hero raises to 9 BB, fold, fold, fold, MP calls 6 BB

Flop : (19.5 BB, 2 players) 6d 3d Qh
MP checks, Hero bets 6 BB, MP raises to 16 BB, Hero calls 10 BB

Turn : (51.5 BB, 2 players) Jd
MP checks, Hero checks

River : (51.5 BB, 2 players) 7h
MP bets 36 BB, Hero ???

I know its only a few hands and I dont know what hand he 4bet TT with (couldve been v fish / short stack) but Im guessing he 4bets QQ+ pre. I have BDFD so easy call. He checks turn so I think check back is standard.

Is river easy call as we block NFD? Spots like this trouble me as although best he can have is KTs, he couldve been bad and called with SC etc which now have me beat. Even 45s now beats me along with any flush.