Ryan Harrison avoided a Brisbane International meltdown to rally from one set down and beat German lucky loser Yannick Hanfmann for a spot in the quarter-finals.
Angered by the music coming from the nearby centre court, the frustrated world No.47 went down a break in a first set he eventually lost in a tie-break.
Hanfmann, a lucky loser who was beaten in qualifying but took the injured Andy Murray’s place in the second round, could not complete the job.
Harrison composed himself in the second set, saving three break points before breaking himself in a decisive period during the second and eventually prevailing 6-7 (7-5) 6-4 6-2.
The American will play Denis Istomin in the quarter-finals, after the Uzbek eased past American Jared Donaldson 7-6 (7-5) 6-2 earlier in the day.
Britain’s Kyle Edmund then battled past South Korean Hyeon Chung in a 2 hour 38 minute exchange, 7-6 (7-3) 5-7 6-4, late in the day.
Edmund, who prevailed in a bruising three-set first round with Denis Shapovalov, will meet either top seed Grigor Dimitrov or Australian John Millman in the quarter-finals.
There are only two seeded players left in the depleted men’s singles in Brisbane and both are on the other side of the draw – defending champion Dimitrov and Australia’s Nick Kyrgios.