Zverev knocked out of Australian Open

Zverev knocked out of Australian Open

Austria's fifth seed Dominic Thiem reached the round of 16 at the Australian Open with a straight sets win over Frenchman Adrian Mannarino on Saturday.

Germany's Alexander Zverev serves during the men's singles third round match against Chung Hyeon of South Korea at Australian Open 2018 in Melbourne, Australia, Jan. 20, 2018.

Chung claimed the scalp of his first top-five ranked opponent with a 5-7, 7-6 (7/3), 2-6, 6-3, 6-0 victory in three hours and 22 minutes on Rod Laver Arena.

It was hard to blame him though as playing 58th-ranked Chung must have felt like slamming your head into a brick wall - such is his court coverage and ability to soak up punishment.

His best Grand Slam showing was the quarter-finals at Roland Garros in 2011.

I'm just trying to play 100 per cent on court. "It happened at Wimbledon, it happened in NY". They're always with me, good times or bad times, so I'm just thankful to you guys.

Thiem, who battled a viral infection in the lead-up to the Open, ramped up his intensity after falling behind, slapping 34 winners to 19 in the final three sets.

"It was a really tough game against Alex Zverev".

Zverev looked to have regained control of the match after racing through the third set, but a sloppy fourth saw his belief vanish.

Thiem showed no ill-effects of his five set win over American qualifier Denis Kudla in the second round in fierce heat on Thursday.

The South Korean's momentum was quickly halted in the third as the German capitalised on a Chung double fault at 40-15 up to go on to break for a 3-1 lead.

It all proved too much for 20-year-old Zverev, who began to unravel in the fourth set, complaining bitterly to the umpire that the lights should be switched on despite it being only 6 overcast Melbourne.

"I can't see the ball", Zverev told the umpire.

It is world No.58 Chung's first tour win over a top-10 ranked player, setting up a fourth-round showdown with six-time victor Novak Djokovic or Spain's Albert Ramos-Vinolas.