And Bosc put the Dragons in front again with a fine soloscore, selling Andy Raleigh a clever dummy before charging through under the posts and adding the extras.
All Blacks substitute Israel Dagg made a major impact, and put the result beyond doubt, with a fine soloscore in the corner on 64 minutes and Carter finally got his kicking game back on track with the conversion and a penalty.
Samir Nasri, taking on Cesc Fabregas' midfield mantle in the absence of Arsenal's inspirational captain through injury, embarked on a weaving, angled solo run that took him past a succession of Porto defenders to score.