The Real Madrid striker scored twice in an 8-0 win against Jamaica in les Bleus' final friendly before the tournament on June 8, his first goals for either club or country since April.
Benzema is one of just three players in France's squad with over 50 international caps - Patrice Evra and Hugo Lloris being the others - after Franck Ribery's withdrawal due to a back injury, and Matuidi is confident he can shoulder his side's goal-scoring burden."Everybody can see that [Benzema] deserves it," the PSG man told reporters when asked about the striker's position.
"Karim is a world-class scorer. He's a player for Real Madrid, the team that won the Champions League. There is nothing more to say.
"I just hope that he is going to be in that form during the World Cup.
"Right now, he is fit and in great form, so he should be able to help us have a great World Cup."
France endured a torrid campaign in the 2010 World Cup in South Africa, finishing bottom of Group A behind Uruguay, Mexico and the hosts after securing only a single point - and Matuidi is keen to make amends for that embarrassment.
"The past is the past, we are now looking at what is in front of us," the 27-year-old said.
"We can speak about a new generation overall. We are all going to discover what it takes to play a World Cup. We feel we are ready to enter the battle. We've really worked well.
"We could see that during training and the friendly games we've played.
"We are fully aware of how tough the opposition is going to be. However we are ready to give our very best in order to get the results we are all waiting for."