Tennis·Recap

Australian Open: Djokovic stunned in straight sets

Six-time champion Novak Djokovic was stunned in straight sets by South Korea's Hyeon Chung not long after Tennys Sandgren upset No. 5 Dominic Thiem at the Australian Open on Monday.

6-time champ falls to South Korea's Hyeon Chung

Novak Djokovic was knocked out of the Australian Open in straight sets by South Korea's Hyeon Chung. (Cameron Spencer/Getty Images)

Six-time champion Novak Djokovic was stunned in straight sets by South Korea's Hyeon Chung not long after Tennys Sandgren upset No. 5 Dominic Thiem at the Australian Open on Monday.

The season-opening major often throws up unexpected results, but the back-to-back upsets Monday resulted in a longshot of a quarterfinal: Chung, the first Korean to reach the last eight at a Grand Slam, vs. 97th-ranked Sandgren, who had never won a match at a major or beaten a top 10 player until last week.

The 58th-ranked Chung relentlessly attacked Djokovic — who is playing his first tournament since Wimbledon because of an injured right elbow — in the 7-6 (4), 7-5, 7-6 (3) fourth-round win.

He ripped 47 winners, including a forehand on the slide and at full stretch on the baseline that put him within two points of victory.

Chung credited the usually athletic Djokovic, who needed a medical timeout in the second set for a massage on his sore elbow, for the inspiration.

"When I'm young, I'm just trying to copy Novak because he's my idol," Chung said. "I can't believe this tonight. Dreams come true tonight."

Djokovic, who winced and grimaced throughout the match — particularly when stretching for backhands, said he'd need to reassess the treatment for his elbow. But he said he didn't want his injuries to detract from Chung's win.

"Amazing. Amazing performance," Djokovic said. "Impressive. Whenever he was in trouble, he came up with some unbelievable shots. Just from the back of the court, you know, he was like a wall."

Sandgren upsets Thiem

The 26-year-old Sandgren, who entered the season's opening major ranked 97th, missed a match point in the fourth set but held on for a 6-2, 4-6, 7-6 (4), 6-7 (7), 6-3 win over Thiem. It followed up his earlier victory over 2014 champion Stan Wawrinka.

"I don't know if this is a dream or not — all you guys are here, so maybe it's not," he said in an on-court TV interview after his 3-hour, 54-minute fourth-round win. "I'm not in my underwear, so maybe it's not a dream."

Sandgren is only the second man in 20 years to reach the quarterfinals on his debut at Melbourne Park.

He converted half of his eight break-point chances, and fended off 10 of the 12 he faced against Thiem, and hit 63 winners against 38 unforced errors in the biggest win of his life.

"Trying to keep riding the wave," said Sandgren, who was named after his great-grandfather and who comes from Tennessee.

Federer sails into quarters

Defending champion Roger Federer had no real difficulties in reaching the Australian Open quarterfinals for the 14th time, accounting for Marton Fucsovics 6-4, 7-6 (3), 6-2.

The 19-time major winner had never played Fucsovics but had beaten his coach — Attila Savolt — here in the second round in 2002.

Roger Federer of Switzerland defeated Marton Fucsovics of Hungary 6-4, 7-6 (3), 6-2 to advance to the quarter-finals of the Australian Open. (Mark Kolbe/Getty Images)

Federer will renew a lengthy rivalry next against Tomas Berdych, who returned to the quarterfinals for the seventh time at Melbourne Park with a 6-1, 6-4, 6-4 win over Fabio Fognini.

The win over Fucsovics was Federer's first day match of the 2018 tournament, and he joked about needing sunglasses and a towel for the beach but said really the only change was to set the alarm for a different time.

Kerber fights off early challenge

Angelique Kerber, the only Grand Slam singles winner remaining in the women's draw, was up earlier, and got a serious wakeup call.

For a while it appeared Kerber's progression could unravel against No. 88 Hsieh Su-wei, a former top-ranked doubles player with a double-handed grip on both sides, until she regained momentum for a 4-6, 7-5, 6-1 win. That earned Kerber a quarterfinal spot against U.S. Open finalist Madison Keys.

With a mix of slice and chips, lobs and bunts, whippy half-volleys and wristy crosscourt ground strokes off both wings, Hsieh pushed Kerber to the extremes.

"Credit to her. She played an unbelievable match," said Kerber, who won the Australian and U.S. Open titles in 2016 and is on a 13-match winning streak to start 2018. "I was feeling I was running everywhere."

Angelique Kerber gestures during her round-of-16 match against Hsieh Su-wei. (Dita Alangkara/Associated Press)

Keys returned to the quarterfinals here for the first time in three years with a 6-3, 6-2 win over No. 8-seeded Caroline Garcia, and is yet to drop a set so far.

Top-seeded Simona Halep, who had to rally from triple match point down to advance through the third round, beat Naomi Osaka 6-3, 6-2.

Halep will play sixth-seeded Karolina Pliskova in the quarters after Pliskova beat fellow Czech player Barbora Strycova 6-7 (5), 6-3, 6-2.

Hsieh, contesting the fourth round in a major for the first time in a decade, certainly made the most of her time back in the spotlight.

The Taiwanese player took out one major winner — Wimbledon champion Garbine Muguruza — in the second round, and took the first set of Kerber.

"I like to play freestyle," Hsieh, a two-time Grand Slam doubles titlist, explaining her unusual array of shots. "Like today I go on the court, if I don't have a plan then I do whatever I can."

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