If this was the last Australian Open singles match of Nick Kyrgios' career — and, to be sure, it's hard to know with him, no matter what came out at his news conference — the big-hitting, big-talking tennis player went out rather quietly Monday night.

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.

Nick Kyrgios said his straight sets defeat to Jacob Fearnley in the first round of the Australian Open on Monday may have been his last singles match at the Grand Slam given his growing frustrations with injury.