Name the Russian mixed martial artist who currently fights in the lightweight division of the UFC and is a training partner of Natalia Vitalyevna Vorobieva, a Russian wrestler who competed in the 2012 Summer Olympics?
Natalia Vorobieva Natalia Vitalyevna Vorobieva (Russian: Наталья Витальевна Воробьёва ; born 27 May 1991 in Tulun, Irkutsk oblast, Russian SFSR, Soviet Union) is a Russian wrestler, who competed at the 2012 Summer Olympics. Vorobieva reached the finals in the 72 kg category where she beat Stanka Zlateva of Bulgaria to win the gold medal. She is also the holder of a number of titles at the youth levels. In the 2015 Golden Grand Prix Ivan Yarygin final match, Vorobyeva defeated Ochirbatyn Nasanburmaa of Mongolia. Vorobyeva train with UFC and M-1 Global MMA fighters, such as Khabib Nurmagomedov, Islam Makhachev, Vyacheslav Vasilevsky, Abubakar Nurmagomedov, Mikhail Malyutin, Ali Bagov.
Oleksiy Oliynyk Oleksiy Oleksiyovych Oliynyk (Ukrainian: Олексі́й Олексі́йович Олі́йник , born June 20, 1977; Russified to Alexey Alexeievich Oleinik, Russian: Алексей Алексеевич Олейник ) is a Ukrainian-Russian mixed martial artist, jujitsuka, combat sambist and grappler currently signed with the Ultimate Fighting Championship, competing in their heavyweight division. A professional competitor who began his career in 1997, he is a M-1 Global veteran and has fought for Bellator, KSW, BodogFIGHT, and YAMMA Pit Fighting. As of July 2017, he is #11 in the official UFC heavyweight rankings. He is the only fighter to win a UFC fight via Ezekiel choke and also holds the record for most Ezekiel choke wins in MMA competition, with ten.