“Initially, I thought it was [booing], because there were some people booing during my practice yesterday,” the three-time Grand Slam champion said.
“I have no idea what for.”
Murray explained that the penny later dropped, but he still didn’t appreciate the noise coming from the stands every few minutes.
He continued: “Yeah, so originally that’s what I thought it was.
“But then yeah after a few times it was like, no, they’re doing that, I think it’s like “Siuu” or something that Ronaldo does when he scores.
“And, yeah, it was incredibly irritating (smiling). Yeah, I think that’s what they were doing.”