Bristol coach Richard Hill was left frustrated that his team did not claim a bonus point in beating Harlequins, but he still believes the pool will come down to a decider against Cardiff Blues in the final match.
Bristol top the group with three wins out of four matches, the only reverse being at Cardiff Arms Park in the opening game, and travel to Stade Francais before entertaining the Blues in their final two games.
Hill was pleased to have beaten Quins and gone top of the group, but felt his side had missed an opportunity to claim a vital bonus point as they scored three tries for the second week running.
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"We look at that now as a bonus point missed. We would not have thought that at the start of the competition because a win against Quins would have been the best thing but we were looking to go one better and get that fourth try today," said Hill.
"Despite the fact they are out of the competition they came here with a fair bit of motivation and credit to them for doing that.
"Nil nil at half-time is unusual, old school really, but not for want of trying there were just too many errors in the first half.
"We will rue some bad misses today for getting that fourth try, but if I had been told at the start we would have won three out of four we would have been very hapy but these Heineken Cup groups can be decided by bonus points and we missed one today.
"I think it will come down to that last game against Cardiff no matter what happens in Paris, I think Cardiff will have to come down here and beat Bristol and we are difficult to beat here.
"That will be a tough one, we are still pretty sore about losing down there when we held them for 60 minutes and then lost four tries at the end.
"We need to try to get something out of Paris having not got something today. I think Harlequins were also pretty sore about drawing with Cardiff so I am convinced they will give them a good run for their money as well.
"It is a huge experience for us all, it is still na outside chance for Bristol to go through but if we do get through at the first attempt it will be a big step forward for the club.
"There is a real buzz about the club, a proper cup atmosphere, and we will keep that through to the last two games going to Paris and then a full house here for the Cardiff game."