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Roberts touched down twice that day and according to the centre, he took the RBS 6 Nations tempo straight back into Racing Metro's hunt for a Top 14 playoff place.
The 27-year-old only made the move from Cardiff Blues to France at the start of the season and he insists his form is ticking along nicely after initially struggling with the change of scene.
"We're hoping to make the play-offs now which would be a great recovery from where we were," he said.
"I feel I've taken some of the Six Nations intensity back to the club, and a few others like Johnny Sexton have as well.
"I won't pretend the first few months over here weren't hard.
"We were integrating a lot of new players, we had new coaches, we also had injuries to key men and bad results were putting us all under pressure.
"But everything has come together in the last couple of months."