Australian number one Nick Kyrgios on Tuesday played down concerns over his hip injury and said he felt ready to play this week's Davis Cup World Group play-off against Slovakia.

The injury forced Kyrgios, the world number 15, to quit the US Open third round in tears just a week ago. But he said in Sydney: "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."

Source: AFP