NEW YORK — Jannik Sinner got broken for the first time in Week 1 of the US Open. Dropped the opening set, even. Fell way behind in the third set, too. “I’m not a machine, you know,” he said with the hint of a smile Saturday. “I also struggle, sometimes.” READ: ‘Healthy’ Jannik Sinner begins US Open defense with quick win Hmmm. Sure, Jannik, maybe so. Still, Sinner is the No. 1-ranked player in men’s tennis and has won the past three Grand Slam tournaments played on hard courts, so no one was surprised when he set aside some lapses […]... Keep on reading: US Open: Jannik Sinner drops a set, reminds folks he's not a machine