MELBOURNE, Australia — After losing a close third-round match to Sloane Stephens at the Australian Open last week, Petra Martic kept her emotions in check as she walked off the court of Margaret Court Arena. But once she was out of sight of the crowd, in the tunnel connecting the arena to the locker room, she could no longer hide her distress. She stepped into a corner, sunk down against a cinder-block wall and broke down in heaving sobs as she covered her face with a towel.

But she was not hidden at all. She was captured by one of the numerous cameras positioned throughout the corridors of the Australian Open.

“It’s just heartbreaking to watch,” ESPN’s Chris McKendry said on the broadcast after the camera zoomed in for a tighter view of Martic’s misery.

The Australian Open, the most remote Grand Slam event, is offering voyeurism without the voyage in a way no other tournament does. Players and their entourages are often unaware how many of their movements are monitored and magnified by cameras that follow them as long and as closely as possible.