Larionov was born in Novosibirsk, Siberia and later moved to Tashkent, modern-day Uzbekistan, due to his father's army service. Introduced to skating by his mother, who was concerned about his health, he found he enjoyed the activity and continued skating after the family returned to Novosibirsk. He later trained for four years in Moscow and then moved to Perm.
Bazarova/Larionov took silver at the 2007 World Junior Championships. In October, they won their first senior international medal when they claimed the bronze at 2007 Skate America. In December of the same year, the pair won gold at the 2007 Junior Grand Prix Final. However, in January 2008, the team was stripped of the medal due to a doping violation on a blood sample Larionov gave before the Final. Larionov was also suspended for two years, beginning on 18 January 2008. His sentence was later reduced to 18-months, and ended on 17 July 2009.
Bazarova decided to wait for Larionov, "There were offers from others, but I said right away that I'm not going to skate with someone else." The pair made their return to competition during the 2009–10 season. Their first event was the 2009 Cup of Russia where they placed fourth and they won the bronze medal at Russian Nationals, earning them further assignments. In January 2010, the pair finished 5th at the European Championships. In February, they placed 11th at the Olympics and then completed their season with an 8th place finish at the World Championships in March. They were named Breakthrough of the Year (pair skating) at the 2010 Crystal Ice Awards held in October 2010 in Moscow.
At the 2011 European Championships, they won the bronze medal after finishing third in both programs and setting personal best scores in the long program and combined total (188.24). Although many skaters, including those based at other Russian training centers, criticized the freezing conditions at the arena, Bazarova said, "At home in our ice rink in Perm, it can also be very cold so we are kind of used to it." At the 2011 World Championships, they finished 5th.
Bazarova/Larionov decided to spend more time in Novogorsk (near Moscow) working with former Bolshoi soloist Liudmila Vlasova, who assisted them with interpretation. They withdrew from the 2012 Nebelhorn Trophy after the short program due to a recurring injury to Bazarova's right hip. On November 1, Larionov said the injury did not require an operation. Bazarova said it was not painful but her leg would feel very weak at times and that massage treated the problem effectively.
After taking silver at the 2012 Rostelecom Cup, Bazarova/Larionov won their first Grand Prix title at the 2012 NHK Trophy. They qualified for their second Grand Prix Final. At the final in Sochi, Russia, they won the silver medal with personal best scores in both programs and a total of 201.60 points.
Bazarova/Larionov withdrew from the 2013 Russian Championships. Aleksandr Gorshkov said that Larionov had boot problems and could not endanger his partner. The pair was named in the Russian team to the 2013 European Championships but withdrew due to Larionov's wrist injury which prevented him from doing a number of pairs elements. They were replaced by Ksenia Stolbova / Fedor Klimov. Larionov had an operation in Moscow. On 21 February 2013, Larionov confirmed they were no longer working with Ludmila Kalinina. The pair trained in Novogorsk, Moscow, advised by Viktor Kudriavtsev, in the period leading up to the 2013 World Championships, with a decision on a new main coach likely to be made after the event. Bazarova injured her hip on a fall while training in Detroit before Worlds. They finished 7th at the event.
On 26 March 2013, Bazarova/Larionov announced they would be coached by Nina Mozer. In preparation for the 2013–14 season, the pair began training in Moscow and then travelled with Mozer's group to West Orange, New Jersey in May.
In February 2014, Bazarova/Larionov appeared at their second Olympics, in Sochi. They were not selected for the team event but did compete in the separate pairs event, placing sixth. The next month, they competed at the 2014 World Championships in Saitama, Japan. During the free skate, Larionov stumbled while setting Bazarova down from a lift but they avoided injury and finished seventh overall. Later that day, 27 March 2014, he told Bazarova he wanted to end their partnership. Nina Mozer made the split public several days later and said she was working to arrange a new partnership for him.
Larionov studied at Perm State Pedagogical University, Faculty of Physical Education.
GP = Grand Prix; JGP = Junior Grand Prix
J. = Junior level; DQ = Disqualified; WD = Withdrew
T = Team result; P = Personal result; Medals awarded for team result only.
Bazarova/Larionov did not compete in the 2008–09 season.
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