Education
In 2013, Annenkova finished 15th in all-around at the 2013 Russian Junior Championships, she finished 2nd place as out of competition at 2013 Moscow Grand Prix behind Yulia Bravikova.
In 2013, Annenkova finished 15th in all-around at the 2013 Russian Junior Championships, she finished 2nd place as out of competition at 2013 Moscow Grand Prix behind Yulia Bravikova.
Her international breakthrough event was competing in junior division at the 2012 Moscow Grand Prix. In 2014, Annenkova finished 4th in all-around at the Russian Junior championships. She qualified to 2 event finals winning gold in ball and ribbon.
Following the leg injury of Yulia Bravikova, both Annenkova and Polyakova flew to Nanjing but Annenkova was selected by Irina Viner as the final representative of her country at the 2014 Youth Olympic Games in Nanjing, China.
Senior
In 2015 season, Annenkova debuted as a senior competing in the international division at the 2015 Moscow Grand Prix. Annenkova finished 6th in all-around at the 2015 Russian Championships.
Annenkova competed as an The Human Context (Out of Competition) at the MTK International Tournament in Budapest and Dundee Cup International in Sofia.
She is the 2014 Youth Olympic champion and the 2014 European Junior ball and ribbon champion. She has also competed at the 2013 Russian-Chinese Youth Games where she won the all-around gold and medaled in all 4 of the event finals. At the 2014 European Junior Championships Annenkova together with teammates (Veronika Polyakova, Yulia Bravikova and Olesya Petrova) won Russia the Team gold. She then competed at the Junior World Cup in Sofia where she won the all-around gold beating Veronika Polyakova by 2.5 points. Annenkova led after the qualification round and went on to win in the all-around finals with a total score of 58.575 points putting her ahead of Belarusian Mariya Trubach and America"s Laura Zeng. She then competed at the 2015 Baltic Hoop where won the all-around silver behind Belarusian Melitina Staniouta. In the event finals, Annenkova won 3 gold medals (ball, clubs, ribbon) and silver in hoop. In April 3-5, Annenkova competed at the Irina Deleanu International tournament and won the all-around silver medal behind Veronika Polyakova. In 2016, Annenkova began her season competing at the 2016 Grand Prix Moscow finishing 14th in the all-around.
Annenkova briefly competed as member of the Russian Group but returned to competing as an individual gymnast.