Flyhalf Craig Warlow added the extras before slotting his first penalty of the game to give the Dragons a crucial advantage.

Leinster centre Kieran Lewis grabbed his first try soon after but another successful kick from Warlow kept the Irishmen at bay.

Contepomi added three more points to his tally on the half hour mark but the rest of the half belonged to the home side as firstly Forster crossed for his opening try before Warlow added a conversion and a further penalty.

Forster nailed home his side's advantage with his second try on the hour and as time was running out Lewis produced a brilliant 80-yard effort for his second that was converted by Contepomi but it was too little, too late as a final penalty from Warlow sealed the win.