He could be heard mumbling to himself on several occasions as he continued to voice his frustration at the conditions of the court.

Kyrgios hit the headlines during his match against Humbert on Tuesday night as well when he spoke directly into a camera about the surface.

“Guys for you watching at home, it should be fast in here. It’s turf. It should be fast,” a visibly-annoyed Kyrgios said.

“That’s grass court tennis. They’ve made it slow. This isn’t grass anymore. This is slow. It’s a joke.