There was no champagne courtside. So, as Matteo Berrettini embraced Jannik Sinner after Sinner’s victory over Alex de Minaur last month to clinch Italy’s first Davis Cup title in 47 years, their teammate, Matteo Arnaldi, did the next best thing: He shook a water bottle and poured it over Sinner and Berrettini. Sinner, 22, ended …
