Answer
Rudy Fernández has won 3 EuroLeague titles with Real Madrid. The first one was in the 2014–15 season, when Real Madrid defeated Olympiacos in the final. The second one was in the 2017–18 season, when Real Madrid defeated Fenerbahçe in the final. The third one was in the 2019–20 season, when Real Madrid defeated Anadolu Efes in the final.