"After the away win in France, if we beat the Dragons at home we are in good control of the Pool. If we don't, it sets up a hell of an encounter going back over the bridge," Hatley told the Bath Chronicle.
"But for us it's more important that we keep building on the momentum we have created. We want to keep on winning to keep moving forward into the two Premiership games we have straight after."
The Dragons beat Bath in a pre-season friendly and opened their European account with a bonus point win over Rugby Mogliano at Rodney Parade. Under new coaches Lyn and Kingsley Jones the Welsh region has transformed its fortunes and Lyn Jones challenged his players this week not to feel intimidated by going to play in England.
Welsh international Andrew Coombs hopes to be fit to lead a side that will include Wales and British & Irish Lions No 8 Toby Faletau. But the 50-8 defeat of the Italian minnows last weekend came at a cost with Wales Under 20 centre Jack Dixon picking up a foot injury that will keep him out of action until after Christmas and hooker Sam Parry joining the injury list with concussion.
"They are doing well and they've started to play some good football. They rush up hard in defence and it's going to be a good game," said Hatley
"I think they will target this game as a big one for them. They will bring down Toby Faletau and the likes and turn it into another tough game for us. But our home form has been good and the pre-season game seems like ages ago now.
"I think they are a different side and we've got a lot of players back. I wouldn't read too much into what happened - both sides used something like 28 or 29 players."