Kuksenkov delighted home fans with a winning score of 15.050 points as the artistic gymnastics competition got under way.
Daniel Korral Barron earned silver with 14.975, while bronze went to the Ukrainian Oleg Stepko after his effort of 14.850.
Kuksenkov, 24, also won gold in the team tournament and in the individual аll-around.
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In judo, Czech Lukas Krpalek won the men’s open, defeating Japan's Masaru Momose. Brazilian Silva David and South Korean Kim Sungmin took the bronze.
In fencing, the French team won gold in the women’s team epee competition, beating the South Korean team, 27:26 in the final. Ukraine won bronze.
Russian Alexey Cheremisinov won in the men's foil individual event at the Kazan Equestrian Complex Indoor Hall, finishing with a score of 15-10, and leaving South Korea's Son Young Ki in second place.
The victory was a nice present for Cheremisinov's birthday: he turned 28 on the day.
"It was difficult at first," Cheremisinov said. "This fight was the turning point; when with the score 6-0 in his favour, I was able to find a hole in his defence, and then I went ahead. Elite fencers compete here, opponents with great potential. So it was really difficult."
American Jeneva Mccall claimed victory in the women's hammer with an effort of 73.75 m. Oksana Kondratieva bagged silver (72.22m) and Zalina Margieva from Moldova bronze (69.20).
"I feel relieved, because I had very hard trainings and was gearing up for it, I was nervous and in spite of everything I won gold medal," Mccall said.
"I like this city, I want to know more about Russia, and about Russian people, because they seem to be kind. Now, after competitions, I will do it."
In diving, Chinese Liang Huo took Universiade gold in the men’s 10m platform. In the final, he scored 531.25 points. Second place went to his compatriot Jun Wu, while bronze was won by Victor Minibaev.
Russians Konstantin Kravchuk and Victor Baluda stormed into the men’s doubles quarter-finals in the tennis competition.
The home duo downed French pair Maxime Quinqueneau and Antoine Hoang 7-5 7-5.
Kravchuk and Baluda will next face the Namibians Jean-Michel Erasmus/Jacobus Serdyn to claim a semi-final berth.
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