In the summer of 2000, Obertas teamed up with Alexei Sokolov and began to represent Russia, coached by Ludmila Velikova and Nikolai Velikov. They trained at the Yubileyny rink in Saint Petersburg. After two fourth-place finishes at Russian Nationals, they won bronze in 2003. They earned a berth in the 2003 European Championships, where they placed fifth, and to the 2003 World Championships, where they finished eighth.