HIGHLIGHTS-Tennis-Australian Open day seven

Highlights of day seven of the Australian Open tennis championships at Melbourne Park on Sunday. Times local (GMT +11): 1830 THIEM KNOCKED OUT U.S. Open champion Dominic Thiem's Melbourne Park campaign ended in the fourth round after he was beaten 6-4 6-4 6-0 by Bulgarian Grigor Dimitrov in just over two hours.

Highlights of day seven of the Australian Open tennis championships at Melbourne Park on Sunday. Times local (GMT +11): 1830 THIEM KNOCKED OUT

U.S. Open champion Dominic Thiem's Melbourne Park campaign ended in the fourth round after he was beaten 6-4 6-4 6-0 by Bulgarian Grigor Dimitrov in just over two hours. READ MORE:

Serena into quarters after surviving Sabalenka test Third seed Thiem slumps out of Australian Open

Osaka back from the brink to reach quarter-finals 'Free spirit' Hsieh rolls into maiden Grand Slam quarter-final

Injured Djokovic's Australian Open record bid hangs in balance Order of play on Monday

Nadal eases past Norrie into last 16 Barty bounces into fourth round on empty court

Medvedev wins five-setter to join Russian charge Players switch back to COVID-mode as fans exit Australian Open

Medvedev skips dessert in hope of sweeter success in Melbourne Quotes from day seven

1615 KARATSEV STUNS AUGER-ALIASSIME IN FIVE-SET EPIC Russian qualifier Aslan Karatsev erased a two-set deficit to beat Canada's 20th seed Felix Auger-Aliassime 3-6 1-6 6-3 6-3 6-4.

1545 SERENA PASSES SABALENKA TEST American Serena Williams, chasing a record-equalling 24th Grand Slam title, held off a spirited challenge from seventh seed Aryna Sabalenka 6-4 2-6 6-4 to reach the quarter-finals.

1255 OSAKA BATTLES PAST MUGURUZA Third seed Naomi Osaka saved two match points as she rallied from a set down to beat last year's finalist Garbine Muguruza 4-6 6-4 7-5.

1219 HSIEH REACHES FIRST GRAND SLAM QUARTER-FINAL Taiwan's Hsieh Su-wei reached the first Grand Slam quarter-final of her lengthy career when she shocked Czech 19th seed Marketa Vondrousova 6-4 6-2 on Margaret Court Arena.

At 35, Hsieh will be the oldest player to make a Grand Slam quarter-final debut in the open era when she plays Naomi Osaka later this week. 11.10 PLAY UNDERWAY ON DAY SEVEN

Play got underway as scheduled on the second day of Victoria's snap five-day coronavirus lockdown, which has resulted in fans being shut out of Melbourne Park. Two new locally acquired cases of COVID-19 were reported in the state in the 24 hours to Sunday morning.

The temperature was a cool 18 degrees Celsius (64 degrees Fahrenheit) with some sunshine forecast for the afternoon.