This has turned into the tightest Pool of them all with only five points splitting the top team, reigning champions Toulon, from the bottom, Glasgow Warriors. Toulon stayed two points clear with the first away win in the Pool to date, 14-9 at Exeter Chiefs, last weekend and will look to keep their title defence on track with a double at Stade Mayol on Saturday.
The Chiefs certainly had their chances at Sandy Park, but Toulon's vast experience enabled them to avoid a second successive away defeat following their slip-up in round two at the Arms Park against Cardiff Blues.
Now it is the Chiefs' who have to go for broke in the south of France as they seek to keep alive their hopes of quarter-final qualification for either competition by avoiding a third defeat. Head coach Rob Baxter believes anything is still possible, but no team has yet found a way to win a Heineken Cup game at Stade Mayol.
The Blues were without up to a dozen senior players for their home clash with Glasgow Warriors in the first round of the back-to-back games, yet rose brilliantly to the occasion to take four points. The boot of Leigh Halfpenny and the dash of fellow Wales and British & Irish Lions star Alex Cuthbert combined to steer them to a morale boosting 29-20 home win - and second place in the Pool.
With only a one point gap to make up at the top of the table, and a return game to come against Toulon, a third win of the campaign would keep Phil Davies' men on course for a first quarter-final since 2012.