On 24 September 2018, Sherazadishvili qualified for his first senior world championships, which were held in Baku, Azerbaijan. He would beat Iceland's Blondal in his first match and rematch his former opponent and 2018 European champion, Mikhail Igolnikov whom he would defeat by waza-ari. In the fourth round he would defeat Turkish judoka, Mikail Ozerler and would defeat former World Champion, Asley Gonzalez in the quarter-finals; advancing Sherazadishvili to the semi-finals. Sherazadishvili met with Hungary's Krisztian Toth whom he defeated by ippon and advanced to the finals against Ivan Felipe Silva. Sherazadishvili made history and became Spain's first ever world champion, when he won by ippon in the finals.