[6] In 2010, he took part in the 2010 Summer Youth Olympics in Singapore, which was held for the first time, and finished in fourth place there in the weight category up to 100 kg behind Ali Magomedabirov, Azerbaijan and Abraham Conyedo, Cuba.

In 2011, he won a bronze medal at the 2011 European Juniors Wrestling Championships in Zrenyanin behind Ihor Dzyatko of Belarus and Aslan Dzebishov of Azerbaijan.

[8] In 2012, Geno Petriashvili suffered a disappointment at the 2012 European Juniors Wrestling Championships in Zagreb, where he only finished 10th in the heavyweight category.

In September 2012, however, he won a bronze medal at the 2012 World Junior Wrestling Championships in Pattaya behind Magomedgazhi Nurasulov of Russia and Muradin Khushchev of Ukraine.

On the way to this success he beat, among others, the multiple medallist at world championships Davit Modzmanashvili and in the final fight also the older and more experienced Giorgi Sakandelidze.

He served a six-months suspension in 2014 after testing positive for the non-performance enhancing Preductal, which Petriashvili had been taking regularly since being kidnapped as a child.

There he defeated Boban Danov from Macedonia and Oleksandr Khotsianivskyi, Ukraine, in the heavyweight division, then lost to former world champion Aleksey Shemarov from Belarus, but secured a bronze medal with a victory over Levan Berianidze from Armenia.

Geno Petriashvili then won another bronze medal with victories over Korey Jarvis from Canada and Tervel Dlagnev from the United States.

He defeated Anzor Khizriev of Russia, Korey Jarvis, Levan Berianidze of Armenia and Olympic champion Taha Akgül of Turkey on the way to this success.

He won over Dániel Ligeti, Hungary, Anzor Khizriev, Russia, Parviz Hadi, Iran and in the final over Deng Zhiwei from China, whom he beat safely with 6:0 techn.

[13] 2018 European Wrestling Championships in Bucharest Geno Petriashvili reached the final with three wins against Taha Akgül, against whom, however, he had no chance on that day and lost clearly with 0:7.

[15][16] In 2023, He won the silver medal at the 2023 European Wrestling Championships in Zagreb, Croatia, losing 9-4 to Taha Akgül in the men's freestyle 125 kg final match.