Her highest Women's Tennis Association singles ranking is Number. 115, which she reached on 25 February 2013. Her career high in doubles is Number.
141, which she reached on 18 February 2013.
Sirotkina began with a bang in Bath, beating the top seed on way to capturing the Aegon Pro Series $10,000 title, while in the $25,000 event the following week she beat two higher ranked players to make the main draw where she destroyed former world top-20 star Anna-Lena Grönefeld before falling in the quarterfinals to Claire Feuerstein. Sirotkina competed in the International Tennis Federation $25,000 Aegon Great Britain Pro-Series Foxhills on 11 July, seeded 5th.
Sirotkina defeated Daneika Borthwick in the first round and Samantha Murray in the second round. In the quarterfinals, Sirotkina was defeated by the first seed, Vitalia Diatchenko.
Sirotkina participated in the Tatarstan Open in singles and in doubles.
In the first round of the singles, Sirotkina defeated Valeria Solovyeva. In the second round, she lost to the 3rd seed, Anastasiya Yakimova. In the doubles, Sirotkina and Lykina lost to the second seeds, Ekaterina Ivanova and Andreja Klepač, in the semifinals, after defeating the 4th seeds, Tetyana Arefyeva and Eugeniya Pashkova in the first round and Natela Dzalamidze and Mandy Minella in the quarterfinals.
Sirotkina competed in the Summer Universiade in both singles and doubles.
In the singles, Sirotkina lost in the third round to eventual bronze-medalist Yoo Mi. Sirotkina competed in the Singles Qualifying of the Tashkent Open.
She was seeded 4th. In the first round, Sirotkina defeated Viktoriya Karmenova.
In the next round, Sirotkina defeated Lyudmyla Kichenok. In the final round, she lost to Aleksandra Krunić.