Riner won his second European gold medal at the 2011 Championships in Istanbul, Turkey. He defeated Nodor Metreveli, Emil Tahirov and Zohar Asaf to win Pool A of the +100 kg competition before defeating Estonian Martin Padar in the semi-finals and Barna Bor of Hungary in the final to win the title. At the 2011 World Judo Championships in Paris Riner won the gold medal in men's +100 kg division, beating Germany's Tölzer in the final. The result meant that Riner became the first ever male Judoka to win five world titles. He won his sixth World Championship gold medal as part of the French side that won the team event.