Denis Sergeyevich Dmitriev is a Russian track cyclist. Specialising in the sprint events, Dmitriev's best result in international sports was winning a gold medal at the 2017 World Championships in Hong Kong. At the 2016 Summer Olympics he succeeded to the bronze medal race in sprint, winning the medal. Dmitriev is a four-time European Champion at senior level in the Sprint event for men, and the most successful sprint cyclist in the competitions's history.

The 2017 UCI Track Cycling World Championships were the World Championships for track cycling in 2017. They took place in Hong Kong in the Hong Kong Velodrome from 12 to 16 April 2017. The last time the championships took place in Asia was at the 1990 UCI Track Cycling World Championships in Japan at the Green Dome Maebashi.