And the 24-year-old played a key role in the 23-16 win, setting up Maxime Médard for the second try after breaking through.
Now back with Racing, he was named to start for the game against Perpignan, with the Parisians seeking to consolidate their for a Top 14 play-off place.
They currently lie in fifth with five games remaining, while Saturday's opponents Perpignan are just a place below them.
And Machenaud said: "We've been in the play-offs for the last two years so we are starting to get a bit of experience at Racing.
"It's in those moments, when we are getting closer to the play-offs, if we get there of course which isn't certain, but with the experience we know how to play these games."