Tetjana Tratschuk has started internationally since 2009. First she took part in the junior competitions of the Summer Biathlon World Championships 2009 in Oberhof , where she was fifth in the sprint and pursuit competitions in cross-country skiing , then in the roller ski competitions , in which she was 12th in the sprint and 17th in the pursuit and fourth with the Ukrainian mixed relay. The following winter Tratschuk started at the Biathlon Junior World Championships 2010 in Torsby and was there 27th of the individual and sprint, 22nd of the pursuit and 13th season. Also at the Summer Biathlon European Championships 2010 in Osrblie , she first competed in the junior competitions. In the sprint she won the title, in the pursuit she came second behind Monika Hojnisz . For the final race, she was appointed to the mixed relay due to her strong performance. With Switlana Krikontschuk , Nasarij Buryk and Andrij Bohaj Trachuk won the silver medal behind the outstanding team of Russia with the relay of Ukraine.