Due to a foot injury from the end of 2016, Nagornyy did not compete in the All Around at 2017 Russian National Championships. He competed on 4 events- Pommel Horse, Rings, Parallel Bars and High Bar. He won the national Parallel Bars title with a score of 15.066. Nagornyy also placed 7th in the Pommel Horse Final and 4th in the High Bar final, after falls on both events. At the 2017 European Championships, not fully healed from the injury; Nagornyy did not compete in the all-around. He qualified in 1 apparatus final and won a bronze in Parallel Bars. Nagornyy won the all-around at the Russian Cup held in Ekaterinburg beating hometown competitor David Belyavskiy. In the Apparatus Finals, he qualified in 5 out of 6 events winning 2 gold medals in Floor Exercise and Vault (tied with Artur Dalaloyan) and 3 bronze medals in Pommel Horse, Rings and High Bar.