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,

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

Nick Kyrgios hinted at retirement while talking to reporters after his first round loss in a return to the tennis court at the Australian Open on Monday, January 13.