The French giants were beaten on the road in their first European outing of the season last month at Cardiff Blues and will have to be much improved to stop the Devon-based outfit from denting their quarter-final qualification hopes ahead of the return fixture at the Stade Felix Mayol exactly a week later.
There are two rounds of domestic action before the Heineken Cup recommences but the side set for a Sandy Park showdown in the Aviva Premiership this weekend, Saracens, have given Bernard Laporte and co an early reminder of just how tough a trip even the top teams face in the South West.
"Their ground has turned into a bit of a fortress and we know about that because we lost at Sandy Park last season," Saracens lock Mouritz Botha, who played against Toulon in last season's Heineken Cup semi-final, told the Exeter Express and Echo.
"It's now a bit like Northampton and Leicester with Franklin's Gardens and Welford Road - you go down there and expect them to be very tough to beat at home.
"It's a hostile environment with a passionate set of fans and they play a great brand of rugby, so it's a massive challenge."
Exeter were only promoted to the top tier of English rugby in 2010 but they have enjoyed a remarkable rise to their current status as Premiership play-off contenders and Heineken Cup pool leaders.
Their first Amlin Challenge Cup campaign brought a place in the last eight and their maiden year in the Heineken Cup saw back-to-back wins over the Scarlets and a near shock against holders Leinster in Dublin.
Rob Baxter's men finished sixth in the league last season following a fifth placed effort the year before and they currently sit fourth in the table as their progress shows no signs of stalling.
Throw in a six-try win over the Blues in Round 1 of the Heineken Cup and a bonus-point in defeat at Glasgow Warriors a week later and it's clear that Toulon, and firstly Saracens, won't have it all their own way at Sandy Park.
"Their rise is incredible, a few clubs have come up and had one good season and dropped off again but they get stronger all the time. They have great coaches and good support for them in place," added Botha.
"Their position in the league table definitely doesn't tell any lies. They are there because they deserve to be there."