Head Coach Hill helped mastermind the press defence during his six-year coaching spell at Bristol and admitted that inside knowledge from the hosts had ensured his Warriors were given a big examination of their defensive credentials.
"I don't think we were nervous early on, but we made some basic mistakes. A few players took a while to come into the game and we soaked up a lot of tackles," said Hill.
"They had momentum and it was a great start by Bristol - if they could play like that for 80 minutes they would be top of the league. What killed us was we got back in the game at 7-7 and then conceded a try from a first phase move from a lineout.
"But having coached at Bristol for six years with a press defence, they certainly know how to break down a press defence.
"They did it superbly just before the end of the first half at Sixways when they scored a great try from a scrum. They know the repertoire of moves and how to break it down.
"I have told the players that no other team in the Championship will know how to break us down like Bristol, they found another great move today so we have got to keep working on our defence. But our heads didn't go down which is important."
Meanwhile, Hill had praise for fly half star Andy Goode who scored 27 points and grabbed two tries - including an early opener when he hacked on from inside his own and won the race to touchdown.
"I have never seen Goodey run that fast - the bench could not believe it - so we will put it on video to have a look at again," joked Hill.
"But, crucially, Goodey had a very good controlled game and I was pleased with him. He kicked well into the corners when we needed him too and had a big game for us."