On 8 May 2015, Sadulaev won the Russian Freestyle Wrestling Nationals again and took part in the European Games in Baku, Azerbaijan, and World Championships in Las Vegas, Nevada. In the Games he outscored four opponents 42–1 (4–0) by technical fall and won gold medal. On 11 September 2015, he won World Championships, in the final knocking down Koloi Kartoev (Selim Yaşar) of Turkey, overall scoring 47–2 (6–0) in the championships. As a result he was given a Mercedes-Benz G-Class G63 and Toyota Land Cruiser 200 by Dagestani business magnate Gadzhiev brothers and Ziyavudin Magomedov.