Flamboyant and passionate coach Herve Renard believes he can lead a reunified France team to Women's World Cup glory, but it has to be his way.

Perennial World Cup underachievers France take on the Matildas in their final warm-up match at Melbourne's Marvel Stadium on Friday night.

The match comes four months after the French soccer federation sacked Corinne Diacre amid a player revolt, when captain Wendie Renard said she would not play at the World Cup if the coach remained in charge.

Former Saudi Arabia boss Renard was appointed later that month and France have since beaten Colombia, Canada and Ireland under his watch.

"My philosophy is clear: it's we can't win anything without a very good team spirit," he told reporters on Thursday.

"Since more than three months now, to be honest, they are perfect.

"They are very dedicated, working very well. Very professional.

"The atmosphere is fantastic now, I'm not trying to convince you - this is the truth. So far, so good."

France have never claimed women's football's greatest prize.

"During the past maybe they didn't realise exactly how was their level. They have to understand there is no one team better than them," Renard said.

"They need to have a strong character like the USA team for example - they don't fear anybody.

"You have to believe in yourself and if this team believes in itself, they will do a fantastic World Cup.

"We built this confidence, now the key is in the hands of the players - if they realise they can do it, they will do it."

As Saudi Arabia coach, Renard, in his trademark tight white shirt, captivated the football world with a passionate half-time speech in the extraordinary 2-1 group stage win over eventual champions Argentina at last year's men's World Cup.

He admitted there had been some adjustments to make in coaching women for the first time, but his character hasn't changed.

"I won't change. This is me - I'm honest always," he said.

Matildas counterpart Tony Gustavsson isn't taking the Frenchman lightly.

"It's not often a coach gets to coach two World Cups in one year, right?" Gustavsson said.

"That must be something unique.

"If you look at what he's done with the team since he came in, I think he has made the team play with a lot of energy.

"It feels like he has something very, very interesting going with the team. They're going to be very dangerous this World Cup."