France's rugby union national team's lock Antonie Claassen (C) vies with prop Vincent Debaty (R) in front of hooker Benjamin Kayser (L) during a training session, on March 15, 2013 at the Stade de France in Saint-Denis, north of Paris, on the eve of the rugby union 6 Nations tournament match against Scotland. AFP PHOTO / FRANCK FIFE
Credit: FRANCK FIFE
Benjamin Kayser of France takes the high ball during the tour match between the Auckland Blues and France at North Harbour Stadium on June 11, 2013 in Auckland, New Zealand.
Credit: Sandra Mu
Benjamin Kayser of Clermont Auvergne looks on during the European Rugby Champions Cup match between Saracens and ASM Clermont Auvergne at Allianz Park on October 18, 2014 in Barnet, England.
Credit: David Rogers
Benjamin Kayser of France in action during the international friendly match between France and Australia (Wallabies) at Stade de France on November 15, 2014 in Saint-Denis near Paris, France.
Credit: Jean Catuffe
Captain Thierry Dusautoir, Yoann Maestri, Damien Chouly, Benjamin Kayser and Nicolas Mas of France before the international test match between France and the New Zealand All Blacks at Stade de France on November 9, 2013 in Paris, France.
Credit: Xavier Laine
Benjamin Kayser of France poses before the 6 Nations match between France and Wales at the Stade de France on February 9, 2013 in Paris, France.
Credit: John Berry
Benjamin Kayser of Clermont Auvergne prepares to throw the ball during the European Rugby Champions Cup pool one match between ASM Clermont Auvergne and Munster at Stade Marcel Michelin on December 14, 2014 in Clermont-Ferrand, France.