The Director of Rugby admits his side were second best on that occasion but now wants them t make amends as Warriors look to build on the big victory over champions London Wasps last time out.
"Northampton have had a very good season. They would have wanted to get off to a good start in the league and they did that when they played us on the opening day," said Ruddock.
"They really out enthused us on the day and got stuck into us, they rattled us a bit and we couldn't really get our game plan going. They were pouring through the lineout and putting the heat on in the tackle area, we never really built our game in the way we felt we could.
"Full credit to them they disrupted us and got the result, we have got to turn the tables on them and put the heat on them and try and force the same lack of composure that they forced onto us.
"We have a point to prove but also we want to build on the win last week. We showed great endeavour and some heroic tackling, but we want a more rounded game.
"We dug in and showed a lot of spirit in defence against Wasps, but if we are honest we know there is room for improvement as it was one of our less attacking displays.
"Hopefully the result will give us some confidence and we can move on. It was a very enthusiastic effort and I think we can get much better.
"Northampton will be hurting after losing last week, they will come up with some international players so it will be a massive challenge for both teams."
Victory over Saints would bring Warriors within touching distance of a number of clubs and Ruddock admits his team only needs to look at the example of Newcastle Falcons to see what a run of results can do.
"If you can string some wins together you can climb quickly," he added. "Newcastle have shown over the last month by putting a few wins together it can catapult you up the league table and improve your standing in the game.
"We need to back up last weekend's result with another victory, if we can do that we can have a strong finish to the season.
"We must try and push on. Bristol are improving and showing huge spirit so they are not going to lie down.
"If we can get a result this week that would be huge for us, but the main thing for us is building on the performance of last weekend."
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