Nick Kyrgios said Thursday his long-term knee injury had suddenly improved, giving him hopes of a "miracle" comeback in time for the Australian Open in January.

A revitalised Nick Kyrgios has revealed his shock plans to make a summer comeback and hopefully play the Australian Open in January.

Nick Kyrgios said he could not explain why, after months of struggling with rehabilitation, there had been such an unexpected and rapid improvement.

From the depths of despair, Nick Kyrgios is feeling buoyant again and eyeing a shock Australian Open comeback.