At 23, Rublev is two years younger than Medvedev and grew up playing junior tournaments against him in Russia. For a long time Rublev, seeded No. 8, and Karen Khachanov, 24, the third member of Russia’s latest golden generation, were better than Medvedev. The rise for Medvedev came in 2018 and 2019, when he nearly beat Rafael Nadal in the 2019 United States Open final.“He reads the game really well,” Rublev said of Medvedev. “It’s amazing, the patience he has to stay so long in the rallies, to not rush, to take the time, because in the end these little details, they make him who he is.”Russia is the only country with two players in the top 10. Khachanov gives it three in the top 20. Aslan Karatsev, 27, another Russian ranked No. 114, came out of nowhere to make the quarterfinals here in his first Grand Slam tournament.Medvedev comes into the quarterfinal on perhaps the best roll of his career. He has won 18 consecutive singles matches. He won the ATP Tour finals in London in November, pulling off the nifty trick of beating the world’s top three players — Novak Djokovic, Nadal and Dominic Thiem — in a single tournament. For Russia at the ATP Cup, he beat Alexander Zverev of Germany, a 2020 U.S. Open finalist, in a tight, three-set match in the semifinal round.Medvedev spent his early childhood in Moscow and played few sports other than tennis growing up. He worshiped Russia’s last golden generation, which included Marat Safin and Yevgeny Kafelnikov, who were in their prime when he was a young child. He moved to France to train as a teenager and became fluent in English and French.Medvedev could be heard screaming at his coach, Gilles Cervara of France, in French during his third-round match against Filip Krajinovic of Serbia, as he frittered away a two-set lead before recovering to win the final set, 6-0.