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): 2110 ZVEREV MARCHES INTO QUARTERS

Sixth seed Alexander Zverev booked his quarter-final spot with a 6-4 7-6(5) 6-3 victory over Serbia's Dusan Lajovic. Zverev will next face either top seed Novak Djokovic or Milos Raonic who meet in Sunday's final match.

2105 HALEP GETS REVENGE ON SWIATEK Romanian second seed Simona Halep came from behind to beat Iga Swiatek 3-6 6-1 6-4 and avenge her defeat by the Polish teenager at last year's French Open.

Halep will face Serena Williams in the quarter-finals as the pair meet for the first time since the Romanian triumphed 6-2 6-2 in the 2019 Wimbledon final. 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:

Zverev reaches last eight with easy win over Lajovic Halep battles past Swiatek in Melbourne to avenge Paris loss

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

Osaka back from the brink to reach quarter-finals Osaka so much more than a hardcourt specialist: coach

'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.