Former France international fly-half Frederic Michalak said Monday he would retire from rugby at the end of the season. Michalak is France's all-time international top point scorer with 436 and he was part of four Six Nations winning teams, including three Grand Slams. But he will be forever remembered in France for his quarter-final substitute appearance in the 2007 World Cup when he set up the winning try for Yannick Jauzion in a landmark defeat of New Zealand in Cardiff. The 35-year-old, who made 77 appearances for France and currently plays for Top 14 side Lyon, said he was no longer confident that he could withstand the rigours of top-class rugby.