 Complete the following phrase:  He began competing among seniors in 2010 and twice won bronze medals at the Russian championships, losing the semifinals to Egor Mekhontsev in 2010 and to Nikita Ivanov in 2011. In addition, he took gold in the Youth European Championships U23 in Kaliningrad. In 2012, Tishchenko became the Russian National champion in heavyweight category. A year later, he would win the gold medal at the 2013 Summer Universiade. He won silver medal at the 