Jannik Sinner beats Daniil Medvedev to win Australian Open, his first Grand Slam title

They are in a hurry, this younger cohort of tennis stars, with no interest in waiting their turn to take over their sport, or respecting their elders.  On a warm Sunday evening in Rod Laver Arena, Jannik Sinner, the 22-year-old fast-rising star from Italy, became the latest member of the ‘next generation’ to win a …