Defending U.S. Open champion Sloane Stephens sounded as if she would have preferred to play her opening match on the same court on which she won her first Grand Slam title last September.

Instead of opening in Arthur Ashe Stadium on Monday, Stephens worked in the brand-new, $150 million Louis Armstrong Stadium that is the apple of the USTA’s eye.

But Stephens issued a bunch of complaints — whether it be trains or planes — about the new venue’s distractions after seemingly not being distracted in whipping Russian Evgeniya Rodina 6-1, 7-5.

“Obviously playing on a court that’s very loud, there’s a lot going on. I think it makes it a little tough to kind of settle down,” Stephens said. “I was happy I was able to kind of find a rhythm.”

So what was the hubbub?

“There was a lot going on between the airplanes and the subway behind the court, the concessions being in the lower bowl, and people walking in the games at 2-all, 3-all,” Stephens said.

Fans are only supposed to move around during changeovers. Stephens also said the new 25-second service clock is a pain.

“I got so much going on on the court, I’m trying to manage like eight different things,” she said.

“I’ll probably play another match on Armstrong, knowing the USTA,” Stephens added. “I got to get my mind right and get ready for it.”

Stephens, the 25-year-old millennial, even was annoyed at the picture-taking by some elders not so swift on their iPhones.

“It’s unorganized out there,” Stephens said. “If you got your phone out, quick selfie, I’m totally fine with it. Most of the time it’s a parent who doesn’t know how to work the phone. It’s a mess most of the time. But the younger kids, the kids from age probably 8 to 15, they’re ready. They’re like, ‘OK, selfie.’ You’re smiling. It’s super easy. But then there’s some that it’s not.”