Ekaterina Vladimirovna Riazanova (, born 6 April 1991) is a Russian former competitive ice dancer. With former partner Ilia Tkachenko, she is the 2010 Trophée Eric Bompard silver medalist, the 2012 Skate Canada bronze medalist, and a three-time Russian national medalist. Career Early career Riazanova's parents put her in skating to improve her health. She skated in singles until ankle problems led her to take up ice dancing under coach Svetlana Alexeeva. She skated for six months with her first partner, Kirill Vakhnenko, and then teamed up with Jonathan Guerreiro in the summer of 2006. Riazanova/Guerreiro competed together for three seasons and won the bronze medal at the 2009 World Junior Championships. They were coached by Elena Kustarova and Svetlana Alexeeva at Blue Bird FSC in Moscow. Senior career In spring 2009, Ilia Tkachenko expressed interest in skating with Riazanova. After a tryout, they both felt it would be a good partnership, despite her needing time to adapt to his different technique and some disapproval from the Russian skating federation. They were coached by Alexei Gorshkov at Odintsovo FSC, near Moscow. Riazanova/Tkachenko began competing together during the 2009–10 season. They finished fourth at the 2009 Nebelhorn Trophy, sixth at their sole Grand Prix event, the 2009 Cup of Russia, and fourth at the Russian Nationals. Riazanova/Tkachenko decided to scrap the free dance they had planned for the 2010–11 season and prepare a new one. They placed fifth at their first Grand Prix event of the season, the 2010 Skate America, and then won silver at the 2010 Trophée Eric Bompard. At the 2011 Russian Nationals, they won the silver medal and their first berth to the European Championships. At the 2011 Europeans, Riazanova/Tkachenko placed fifth in the short dance, sixth in the free dance, and sixth overall. Russia had only two spots to the World Championships and since both Bobrova/Soloviev and Ilinykh/Katsalapov had placed ahead of them at Europeans, they did not make the team, however, they continued training as first alternates and also worked on new programs until the end of May; after vacation, they resumed training for the new season on 20 June, including a three-week camp in Bulgaria. For the 2011–12 season, Riazanova/Tkachenko were assigned to 2011 Skate Canada and 2011 Cup of Russia as their Grand Prix events. On their free dance, which was choreographed by Sergei Petukhov, Riazanova said, "A young woman remembers her beloved,