$20 10k watched this hand happen should BTN Call or fold on river?

[Toronexti]

Poker Stars
No Limit Holdem Tournament
Blinds: t15/t30
9 players
Converter

Stack sizes:
UTG: t2455
UTG+1: t3130
MP1: t3365
MP2: t4005
MP3: t3135
CO: t2315
BTN: t2685
SB: t2560
BB: t3110

Pre-flop: (9 players) BTN is Button with J[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/heart.gif[/img]
6 folds, <font color="#cc0000">BTN raises to t90</font>, <font color="#cc0000">SB raises to t180</font>, BB folds, BTN calls t90 <font color="aaaaaa">(pot was t300)</font>.

Flop: T[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] (t390, 2 players)
SB checks, BTN checks.

Turn: K[img]/images/graemlins/heart.gif[/img] (t390, 2 players)
SB checks, BTN checks.

River: A[img]/images/graemlins/club.gif[/img] (t390, 2 players)
<font color="#cc0000">SB bets t810</font>, BTN ?

Should BTN be calling here with the J8?