The former Wimbledon finalist has not played since 2023 following knee and wrist injuries but is feeling "amazing" after reconstruction surgery on the latter as he prepares to make a return to the Grand Slam stage in his home country next year.
He told 9News Melbourne: "Honestly, this is probably the best I've felt in two years.
"I played that amazing year in 2022. Then at the finals in Wimbledon and US Open that's when I started feeling some issues in my wrist. I had that wrist reconstruction and now I'm feeling amazing.
"It was a 15 miracle per cent chance that I was going to get back to playing at this level and here we are."
Kyrgios admits that the "brutal" nature of his injuries were horrible but he refused to give up on the sport despite such a long period out of action.
He said: "Physically it was brutal. Mentally, I wasn't going to allow myself [to give up].
"I always have wanted to leave the game of tennis myself. I wasn't going to let this injury be the dictator of if I would ever play again.
"I started hitting fluffy balls that under-10s used to learn on. I had to teach my right wrist all over again."
Kyrgios believes that anything he achieves in the sport is now a "bonus" after making such an unlikely return from injury.
The fiery Australian said: "I've already won in my eyes.
"Now everything I do on the tennis court, whether I win a match or a tournament or anything like that, is going to be a bonus."