Gut-wrenching defeat for Aleks Vukic, who just kept fighting back every time he looked down and out.
He will probably thinking about his two points he lost on serve when up a mini-break at 6-5 in the match tiebreak, but even then he still got it back to seven-all.
The world No.68 broke new ground at Melbourne Park this week, making the third round of a grand slam for the first time in his career.
That follows him beating two top-20 stars - Casper Ruud and Frances Tiafoe - late last year, so he is in good form and has set himself up for a big year.