But Sandgren's 6-2 4-6 7-6 (4) 6-7 (7) 6-3 triumph at a heaving Hisense Arena made the Tennessee native only the second debutant to reach the Australian Open quarter-finals in 20 years. It was a good tournament, of course. At times, Kerber was frustrated with the shot selection by Hsieh, who had beaten Wimbledon champion Garbine Muguruza in the second round. There is some kind of a reason behind all of this.
Sandgren served magnificently to march to the brink of victory and sealed the match in style with a thumping forehand victor from the baseline.
"I know that I serve well". "I try to copy Novak in the way I play, he is my idol". "Dreams come true tonight". Unfortunately, it's not great.
Two days after after a gruelling five-set contest in 40C heat, Edmund found the energy in much cooler conditions to see off the experienced Seppi and make a Grand Slam breakthrough. It's an awesome opportunity and I think he's looked back at this year and previous years and felt that there have been dozens of opportunities that he felt he had meat left on the bone and he left it there.
Djokovic said he'll meet with his team to determine next steps.
"He's playing some unbelievable tennis, and that match kind of helped me raise my level".
Thiem saved a match point with a blistering backhand down the line and held on to force a deciding fifth set. It followed up his earlier victory over 2014 champion Stan Wawrinka.
Sandgren is only the second man in 20 years to reach the quarter-finals on his debut after Alexandr Dolgopolov in 2011.
"I'm staying calm and not getting too upset, not getting too up, not getting too down", Sandgren said when asked how a player with only two ATP tour match victories kept believing he had what it takes to advance to a Grand Slam quarterfinal. But all you guys are here and I'm not in my underwear so maybe it's not.
He converted half of his eight break-point chances and fended off 10 of the 12 he faced against Thiem, and he hit 63 winners against 38 unforced errors in the biggest win of his life.
The 97th-ranked Tennessee native captured the decisive break against the Austrian in the sixth game of the final set and sealed the match in style with a thumping forehand victor from the baseline at a raucous Hisense Arena.
She fell against a pool table and hurt herself in the excitement of supporting him during an earlier match at Melbourne Park and has been laid up in bed since.
A former Tennessee tennis player is making a deep run down under in the sport's first major tournament of the year.
Information from The Associated Press was used in this report.
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