Sweeney missed the conversion, but he was left off the hook when Emerick touched down with extra-time looming.
BBC: Dragons 22-15 Calvisano
2.
Emerick was the villain last season when he scored the winning try in Overmach Parma's Heineken Cup play-off win against the Dragons.
BBC: Dragons 22-15 Calvisano
3.
Paul Emerick, Jamie Corsi, Ashley Smith, Phil Dollman, Gareth Maule, Alix Walker, Lewis Evans and James Harris have all signed contract extensions at Rodney Parade.