Sixteen minutes into his match against Alex De Minaur, Matteo Berrettini is 4-1 up in the first set. Berrettini, I’ve learnt, is the only player to have a non-sporty clothes sponsor. Hugo Boss in fact. And he looks duly immaculate and ruggedly coiffured. De Minaur , the Australian Snow White to Nick Kyrgios’s Rose Red, is struggling with Berrettini’s serve and touch tennis.