HIGHLIGHTS-Tennis-Australian Open day eight

Highlights of Monday's eighth day of the Australian Open, the first Grand Slam tournament of the year (all times GMT): 0612 PLISKOVA TOO GOOD FOR MUGURUZA

Karolina Pliskova defeated fellow former world number one Garbine Muguruza 6-3 6-1, the Czech seventh seed prevailing in one hour to set up a quarter-final against either Simona Halep or Serena Williams. READ MORE

All over for Sevastova as Osaka reaches quarters Svitolina masters Keys to unlock passage to last eight

Federer knocked out by Greek wunderkind Tsitsipas Idol Federer becomes Tsitsipas's "rival"

Federer rues missed chances in Tsitsipas thriller Pavlyuchenkova beats Stephens in marathon contest to reach quarters

Barty reaches Melbourne quarters with win over Sharapova Unseeded American Collins hammers Kerber to reach quarters

Nadal blows away Berdych to reach quarter-finals Kvitova back in the Grand Slam big time

Unseeded Collins and Tiafoe make quarters on 'Super Sunday' Birthday boy Tiafoe topples Dimitrov to reach quarters

Australia's Barty living in the moment as nation's hopes surge Bautista Agut upsets Cilic to make Australian quarter-finals

Halep not intimidated by Serena ahead of Melbourne showdown FACTBOX-Simona Halep v Serena Williams [nL3N1ZK07M

Australian Open order of play on Monday 0525 FOURTH SEED ZVEREV FALLS TO RAONIC

Fourth seed Alexander Zverev was knocked out of the fourth round by Canadian Milos Raonic, who sealed a 6-1 6-1 7-6(5) win in just under two hours. A frustrated Zverev smashed his racquet at one point but managed to save two match points in the third set before Raonic clinched the victory in a tiebreak.

0302 OSAKA RALLIES TO VICTORY Naomi Osaka dropped the opening set before coming back to defeat Latvian Anastasija Sevastova 4-6 6-3 6-4 and reach the Australian Open quarter-finals for the first time.

After losing the first set tamely, Osaka earned a decisive break to go up 4-2 in the second set before levelling the match. The world number four endured some nervy moments in the decider before sealing the contest in one hour and 47 minutes. Up next for Osaka is WTA Finals champion Elina Svitolina. The Japanese has lost three of their five career meetings, including their most recent clash at Miami last year.

0153 SVITOLINA INTO QUARTER-FINALS Sixth seed Elina Svitolina overcame a mid-match blip to beat American Madison Keys 6-2 1-6 6-1 on Monday. (Reporting by Shrivathsa Sridhar in Bengaluru;)