Former World Fighter and US Open finalist Kei Nishikori has not competed since this summer's US Open tournament because of an elbow injury that operated in October.

Now it is clear that the comeback will be delayed further. Today, it became clear that Japan, which is now ranked 13th in the world, misses both the ATP Cup Monday and the Australian Open.

- Today, together with my team, I have made the decision that I am not yet 100 percent ready or healthy to compete at the highest level. But it was not an easy decision to make as Australia is one of my favorite places to compete, he says in a statement according to the AFP news agency.

The Australian Open starts on January 20.