Daniil Sergeyevich Medvedev is a Russian professional tennis player. He has been ranked as the world No. 1 in men's singles by the Association of Tennis Professionals (ATP). Medvedev has won 22 ATP Tour-level singles titles, including the 2021 US Open and 2020 ATP Finals.
Medvedev made his ATP Tour main draw debut at the 2015 Kremlin Cup. In 2018, Medvedev won his first ATP Tour singles titles, and achieved a breakthrough in 2019, making his top 10 debut and reaching six consecutive tournament finals, including at the US Open. He won the ATP Finals in 2020, defeating the top three ranked players in the world en route to the title. In 2021, Medvedev contested two major finals against Novak Djokovic, winning at the US Open to claim his first major title and deny Djokovic the Grand Slam.
Shortly after reaching another Australian Open final in 2022, Medvedev became the first man outside of the Big Four to attain the world No. 1 ranking in nearly 20 years, the third Russian man to do so after Yevgeny Kafelnikov and Marat Safin, and the 27th man overall.