SB vs BB fight. Do I have to call this river bet ?

[King_Arthuro]

PokerStars No-Limit Hold'em, $0.50 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Button ($30.15)
SB ($48.50)
Hero ($64.85)
UTG ($25.50)
MP ($60.50)

Vilain is a new one. Zero read.

Preflop: Hero is BB with A, 7.
[color=#666666]3 folds</font>, [color=#CC3333]SB raises to $1.5</font>, [color=#CC3333]Hero raises to $5.5</font>, SB calls $4.

Flop: ($11) 6, A, 4 [color=#0000FF](2 players)</font>
[color=#CC3333]SB bets $7</font>, Hero calls $7.

Turn: ($25) T [color=#0000FF](2 players)</font>
SB checks, Hero checks.

River: ($25) 9 [color=#0000FF](2 players)</font>
[color=#CC3333]SB bets $20</font>, Hero folds.

Final Pot: $25

Thoughts about flop : Do I have to raise and fold to a reraise ?
River : As I 've never represented the A, is this a call ?

Thx for opinions

++

[yeotaJMU]

this is tough as played... youre hand is looks weak to him as you 3 bet preflop then call on a dry board. seems to be a fold though its hard to see villain firing twice with a total bluff which is basically all you beat (A7 is chop you beat only A3 A2).

also dont show your river action.

[munkey]

uh not sure I like the 3bet preflop with a7o -what kind of player is he?

When he calls your 3bet and donks the Axx dry flop and then puts in almost 1/2 stack on the river river i think your toast -do you think a3 or worse does this ?

[Ender Wiggin]

you can not fold this after the turn checks through imo

[munkey]

Isn't his is a 3bet pot?

If villian is bluffy donk then call but if he's at all semi-sane I insta muck this -hence I asked what kind of player he was -READS mucha importante.

[King_Arthuro]

Thats the problem, I had zero read as he was new in the game.

I raised pre, planning to C bet the flop but his bet confused me a little bit ^^

Thx for answers

[kroeliewoelie]

I think you are over defending your big blind a bit. Wait for a read to do it with typical RIO hands like A7o.

As played I don;t understand why you do not bet the turn.

[kindergartencop]

just fold preflop, especially against an unknown. id bet turn. fold river.

[King_Arthuro]

yup,

I guess I had to bet that turn like a 2/3 pot bet, fold to a C/R and try to C/C the river.