"I just try to stick in there", Osaka said.
Svitolina booked a spot in the Australian Open last-eight with a 6-2, 1-6, 6-1 win over American Madison Keys.
Osaka finished the match with 99 points to Sevastova's 89 to reach her first quarter-final in the event, where sixth seed Elina Svitolina awaits her next.
The bubbly 21-year-old's achievement in NY made her the first player from her country to win a major, and with it came fanatical support.
At a tournament featuring thrilling runs by a number of youthful players, 21-year-old Osaka hunkered down to watch 20-year-old Tsitsipas take on Federer on Sunday, and seeing the Greek topple the Swiss master gave her an additional spur.
Despite a kickass anti-piracy campaign, Vicky Kaushal's Uri
Since content of the war-drama is good, the film did solid business on Saturday collecting Rs 12.43 crores. The makers also organised a special screening for Indian President Ram Nath Kovind a few days back.
"I was watching all these kids winning". The reigning BNP Paribas WTA Finals Singapore presented by SC Global champion won both of their 2018 meetings in straight sets - most recently at the Miami Open, when she ended Osaka's winning streak after winning the BNP Paribas Open in Indian Wells and shocking 23-time Grand Slam champion Serena Williams in Crandon Park. I feel like during the first set, I might have tried to over-hit or she (Sevastova) was returning a lot of balls.
Williams has looked in ominous form so far at Melbourne Park, dropping just nine games, as she seeks one more Grand Slam title to put her alongside Margaret Court's record 24. Like in Brisbane International, I played the same sort of match, like, I lost the first set and managed to win again. "So, yeah, it is a little bit natural, but unnatural at the same time", she added.
"I haven't played the world number one since I've been back, I don't think".
The victor will play seventh seed Karolina Pliskova, who won the Brisbane International warm-up, or two-time major victor Garbine Muguruza.
"I think that in the third set we obviously had a really long game at 1-All, and that was where all the momentum swung", Keys said.
He will face Croat Borna Coric or Frenchman Lucas Pouille next.
Whoever goes through will have a quarter-final against Japan's eighth seed Kei Nishikori or Spain's Pablo Carreno Busta.