In 2010 Parra was instrumental in guiding France to a Six Nations Grand Slam. He was picked partly after Julien Dupuy who was first choice in the 2009 autumn internationals was banned for eye gouging. After being paired with the equally youthful Francois Trinh-Duc at halfback he produced a number of masterful performances, including a rout of reigning champions Ireland at the Stade de France.