At the 2013 Russian winter championships Ruzavin was second to Pyotr Trofimov, but gained selection for the 2013 European Race Walking Cup and shared in the team title with winner Denis Strelkov and Aleksandr Ivanov. He was the winner at the summer Russian championships ahead of stable-mate Petr Bogatyrev in a time of 1:19:08 hours. He led from the start at the 2013 Universiade, held in Kazan, but fell back to fourth place while fellow Russian Andrey Krivov won the title. Ruzavin gained selection for the 2013 World Championships in Athletics hosted by Moscow – his first major global championships – but despite being among the favoured entrants he could not match his earlier form and was well down the field in 49th place, nearly twelve minutes behind gold medallist Aleksandr Ivanov.