Villa , who cemented their place in the top four with a fifth successive away win , came from behind to grab three points .
Sunderland were left to wonder what might have been after losing to Aston Villa in controversial circumstances .
Aston Villa , who cemented Aston Villa 's place in the top four with a fifth successive away win , came from behind to grab three points .
Sunderland were left to wonder what might have been after losing to Aston Villa in controversial circumstances .