Daniil Medvedev overcame buttock pain and a walk-out by his coach as he withstood a five-set test from Filip Krajinovic at the Australian Open on Saturday.
The fourth seed blew a two-set lead and needed treatment to his left glute before finally moving past the Serb 6-3, 6-3, 4-6, 3-6, 6-0 and into the fourth round, extending his win streak to 17.
An agitated Medvedev repeatedly yelled at his box in an empty Rod Laver Arena as he struggled in the fourth set, with coach Gilles Cervara eventually walking out and not returning.
"I don't know what was going through his head, but at least what he said is that he was sure I'm going to win, and he just wanted to leave me alone to be calm," said Medvedev.
"Myself, as a human, that's why we can have, let's call it, some frustrating moments, both of us, because we both want to win.
"He wants me to win so he felt like that (leaving) was the best thing to do."
Cervara's departure seemed to do the trick, with Medvedev racing through the fifth set without losing a game in just 25 minutes to seal the win.
Medvedev is bidding a maiden Grand Slam title and to become only the third Russian man to win a major after Yevgeny Kafelnikov and Marat Safin.