Leinster utility back Luke Fitzgerald insists his side can still reach the knockout stages despite losing their two opening matches.
The Irish province suffered a humiliating 33-6 home defeat to Wasps in their tournament opener before losing 19-16 against Bath last weekend.
That means the three-time champions only have one losing bonus point from those games ahead of December's double header against Toulon.
But Fitzgerald is confident Leinster's Champions Cup campaign is not over, especially after Toulon also suffered a big defeat at Wasps at the weekend.
"It's very important that we don't lose confidence," he told the EPCR website.
"We have some difficult games coming up in terms of the (Champions) Cup and it is very important that as long as there is still an opportunity we give it our all. I think we will. This group is going to grow and get better.
"You probably saw that Toulon struggled a bit as well on the weekend against Wasps, because they have an awful lot of guys coming back from World Cup duty, the same as ourselves, which does make it a little bit tricky to getting used to different systems, playing with different guys again."