The Canberra-born star, who pulled out of the Olympics last month and was forced to quit in the third round of the US Open due to injury, was unhappy at courtside media in Sydney and then refused to answer a question on his commitment to Australia.

Kyrgios also revealed he has buried the hatchet with team-mate Bernard Tomic as the Australia team gear up for their Davis Cup World Group play-off clash against Slovakia.

“I wouldn’t be here if I didn’t want to play.”

“I feel ready. I’m playing probably the best tennis I have,” added the 21-year-old.

“I’ve hit twice since I’ve been here and been going for about an hour to an hour-and-a-half, so it’s feeling good and I’m feeling confident with it.

“I just got a niggling injury that came out of nowhere almost. (But) I feel I’ve been going pretty well. I’ve been on the rise the whole year. I’ve been playing well. I feel confident and I think we can do great things.”

Kyrgios – who made his Davis Cup debut in the doubles as an 18-year-old in 2013 – has only played four ties, with a 3-4 win-loss record in singles.

Bernard Tomic and doubles specialists John Peers and Sam Groth complete the team to face Slovakia from September 16-18, where both countries are trying to secure a place in next year’s World Group.

Kyrgios, who like Tomic has a chequered reputation, praised his team-mates, saying: “It means a lot to me being… alongside these guys trying to get back into the World Group.”