Report: Wasps 31-37 Leicester More photos from the match

The Tigers face Wasps in the return match at Welford Road next Sunday as they seek to leapfrog over the defending champions in Pool One.

"Just because we've earned victory in this one guarantees nothing next Sunday," said Johnson.

"We must remember Wasps are the English and European champions and there is an enormous amount of work to do."

Johnson added: "I remember us going to France and winning at Toulouse but they beat us over here.

"Groups like this are not separated by much."

Leicester coach John Wells also believed lessons can be learned from last season's Heineken Cup campaign.

Tigers, champions in 2001 and 2002, will be favourites to top Pool One if they complete the double over Wasps, leaving the London side to battle it out with Biarritz.

We'll come out with a point to prove next week Wasps captain Lawrence Dallaglio

"Celtic Warriors went to Wasps and won last season, then went back to their home patch and lost," said Wells.

"Wasps will not give up, and they will fancy the challenge of going away from home to get a result in exactly the same way we relished the challenge of going to Wasps."

Wasps can take heart from the fact that Leicester have suffered four previous Heineken Cup home defeats - against Toulouse (1997/98), Leinster (1999/2000), Munster (2002/03) and Stade Francais last season.

Skipper Lawrence Dallaglio has already vowed to make amends for Sunday's defeat in the return fixture.

"We'll come out with a point to prove next week," Dallaglio said. "They won't have it easy."

Dawson issues Ellis riposte

Wasps will spend a large part of their week working on negating Leicester's complete dominance in the scrum on Sunday.

But director of rugby Warren Gatland insists the defending champions can reverse the outcome of the home leg.

"It was a game that was Test match level," Gatland said. "For a pool game you couldn't get anything as intense as that.

"They blew us away in the first 20 minutes but we were brave and fought back.