The 29-year-old’s Australian Open return was short-lived — and he warned it could be his last singles match in his homeland.

After surgery and close to 16 months of around-the-clock rehabilitation, things began looking up for Nick Kyrgios. And yet here he is, dealing with pain once more.

Down here, it’s all about their own tennis yin and yang. One is a top 10-player who will do whatever he can to avoid controversy, while dedicating every ounce of his energy to the sport. The other is an unranked unicorn,