Alun Wyn Jones insists Wales must beat World Cup hosts France on Sunday, to generate some winning momentum.
The Ospreys star scored a try in Wales' heartening 27-20 victory at home to Argentina at the weekend.
Beating the world's fifth ranked nation has boosted belief in the squad, but that result came on the back of a record 62-5 loss to England at Twickenham.
Jones is only looking forwards from now on though, starting with what he admits would be a shock victory over Les Bleus.
"Any team that comes up against them in the World Cup is going to face the huge backing they attract. It will be like playing against 16 men," Jones said.
"The flair France possess is second to none. They are definitely a big threat.
"I also rate the French defence very highly."
Reasons to be cheerful
Bernard Laporte's side heads into the match following back-to-back victories over world champions England.
But having run the French close in their 32-21 defeat in the RBS Six Nations tournament in February, Jones remains upbeat.
"We went to Paris last season and scored a couple of tries, which bodes well for our attacking options," he added.
"For us, it is about wanting to maintain our winning form going into the World Cup - and continue the momentum we gained from beating Argentina.
"It was a weight off the shoulders. It is sweeter when you win, and we have just got to try and maintain that."
Wales have been drawn in Pool B for the World Cup, and start their campaign against Canada on September 9.
What will the outcome be on Sunday?