Leicester will enter a Heineken Cup cauldron tomorrow knowing defeat against French giants Toulouse could see their quarter-final hopes evaporate.
Tigers arrive at the 37,000-capacity Le Stadium in southern France desperately needing victory.
Leicester, the 2001 and 2002 European champions, cannot realistically afford a second Pool Six loss following an opening weekend reversal against Leinster.
And although Tigers beat Toulouse 14-9 at Welford Road last Saturday, their opponents showed enough quality in dreadful conditions to suggest the return encounter could be a completely different story.
"Toulouse are a world-class team," acknowledged Leicester assistant coach Richard Cockerill.
"They are certainly one of the teams who can win this tournament, and they are a better side than they were last year.
"We will take heart from the win last Saturday, but we also class ourselves as one of the big teams, and we should have been better.
"We need to win all our games - second is not going to be good enough in this group - and to win in Toulouse, we will need to do everything right and stop them playing."
Leicester boss Marcelo Loffreda has made several changes, including recalls for England World Cup forwards George Chuter, Ben Kay and Lewis Moody, together with Irish international Geordan Murphy, who starts at full-back.
All Blacks centre Aaron Mauger though, who looked well short of match sharpness on his debut last weekend, drops to the bench as Ollie Smith and Dan Hipkiss forge Tigers' midfield partnership.
Current form suggests Pool Three contenders Bristol should remain on a quarter-final course by seeing off Memorial Stadium visitors Harlequins tomorrow.
Bristol beat Quins 17-3 a week ago, but the west country club's head coach Richard Hill is braced for a backlash.
Hill said: "The word coming out of the Harlequins camp is that they've had a right old beasting this week, particularly on full contact.
"They will bring a highly-motivated squad and will be looking to get their season back on track.
"We will probably have to produce a better performance than last weekend, but we've had an outstanding week of training, so I am happy.
"As a club, it is great that we are still alive in the Heineken Cup because it gives us a bit of an edge and keeps everybody focused.
"We have established ourselves in England over the past couple of seasons, and it would be good to get the Bristol name known throughout Europe as well."
Wing Anthony Elliott, prop Darren Crompton, flanker Joe El Abd and number eight Dan Ward-Smith all gain starts for Bristol, while Quins boss Dean Richards has made numerous changes, with international trio De Wet Barry, Andy Gomarsall and Nick Easter among those who don't feature.
Munster, meanwhile, can continue Llanelli Scarlets' dismal Heineken Cup campaign by claiming an anticipated victory at Thomond Park tomorrow.
But Munster skipper Ronan O'Gara has delivered a warning that Llanelli - despite failing to collect a point in Pool Five so far this term - should not be underestimated.
He said: "The calibre of teams in this pool is incredible (Wasps and Clermont Auvergne make up the quartet), and you have to fight for every point.
"People have to be very careful not to write Llanelli off, because with the type of rugby they play, they can attack from anywhere and be dangerous."
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