Japanese fourth seed Naomi Osaka edged past 13th seed Anastasija Sevastova of Latvia in three sets Monday to reach the Australian Open quarter-finals.
The US Open champion triumphed 4-6, 6-3, 6-4 to set up a last eight clash with Ukrainian sixth seed Elina Svitolina and keep alive her dream of a second successive Grand Slam title.
It is the second time in a row the 21-year-old had been forced to come back from a set down after struggling to overcome Taiwan’s Hsieh Su-Wei in the previous round.
Osaka had to compose herself at times on court against the dogged Sevastova, who went into the match with a 2-2 record against the 21-year-old.
She had beaten the Latvian in a tight three-setter at the quarter-finals of the Sydney International this month and Sevastova appeared intent on exacting revenge on the Grand Slam stage.
The 28-year-old broke early in the opening set, holding on to the advantage to maintain pressure on her younger opponent. Osaka buried her head in her hands and mumbled to herself as she served to stay in the set at 5-3.
Shaking off the Latvian proved a difficult task though, as Sevastova put the set back on level terms at 3-3 after bringing up six break points. Osaka managed a crucial break back in the next game and held on for victory.
The 26-year-old Pliskova has been a regular in the second week of Slams in recent years, reaching the quarters or better seven times since late 2016 while still searching for a breakthrough win.
But she said Melbourne Park was her favourite venue after also reaching the quarters in 2017 and 2018. She entered this year’s event on a high after winning the Brisbane International warm-up.
Keys, a US Open finalist in 2017, started slowly but came back to take the second set and put Svitolina under pressure at the start of the third.
The turning point was a marathon 16-minute game early in the deciding set that went to deuce 11 times as Keys chased a decisive break. But the American’s resolve crumbled when Svitolina held off five break points then gained an advantage in the next game.
Svitolina was a quarter-finalist at Melbourne Park last year and has made the last eight at Roland Garros twice but is yet to progress further in a Grand Slam.
The American was rewarded with a double break taking the set 6-1 after 23 minutes.
The early stages of the decider developed into a dogfight before Svitolina prevailed over the frustrated Keys.