Which damage gets prevented?

So in a game of @mtg@mtgzone.com the other day, my enemy attacked with Mons’s Goblin Raiders and Ghyrson. Which would normally deal four damage total then two more from Ghyrson. But I had played a Bandage, preventing “the next” damage. If that next damage is the one from the Goblins, I don’t get the extra Ghyrson damage, so that’s why it matters.

There was no first strike in this particular situation.