Carlos Alcaraz has walked out of Centre Court and into a spying controversy after reaching the Wimbledon semi-finals for the first time.

The world No.1 beat fellow 20-year-old Holger Rune in straight sets to reach the last four.

He then had to respond to reports his father Carlos, a regular member of his entourage, recorded Novak Djokovic - who he is seeded to meet in the final - while the seven-time champion was training at Wimbledon’s Aorangi Park.

“Oh, probably it is true. My father is a huge fan of tennis. He doesn’t only watch my matches,” said Alcaraz.

“I think he gets into the club at 11am, gets out at 10pm, watching matches, watching practice from everyone.

“Being able to watch Djokovic in real life, yeah, probably it is true he’s filmed the sessions.”

Pressed on whether having the video footage would give him a competitive advantage, Alcaraz said: “I don’t think so.

“I mean, I have a lot of videos from Djokovic on every platform. I think it’s not an advantage for me.”