Riner aiva nhengo yeLevallois Sporting Club muLevallois-Perret, France uye anodzidziswa naChristian Chaumont naBenoît Campargue. Akakunda World uye European junior mazita muna 2006. Muna 2007, akahwina menduru yegoridhe kuEuropean Judo Championships
muBelgrade, Serbia, zuva rakatevera zuva rokuzvarwa kwake rechi 18. Pa 2007 World Judo Championships muRio de Janeiro, Brazil, akava muduku kudarika vose vakura mukwikwidzi wenyika apo akakunda mutambo weheavyweight (+100 kg), achikunda 2000 Olympic gold medallist, Kosei Inoue weJapan, mu semi-final.