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Caroline Wozniacki ousted at Australian Open

A frustrated Caroline Wozniacki is not very kind to her racket during her round of 16 loss.

NARENDRA SHRESTHA / EPA

A frustrated Caroline Wozniacki is not very kind to her racket during her round of 16 loss.

MELBOURNE — After twice failing to win her breakthrough major as the No. 1-ranked woman at the Australian Open, Caroline Wozniacki is now expected to drop out of the top 10 after a fourth-round loss to a resurgent Svetlana Kuznetsova on Monday.

Wozniacki had the top ranking for the 2011 and 2012 editions of the season’s first major, but lost in semifinals two years ago and the quarterfinals last year. Her 6-2, 2-6, 7-5 defeat to two-time Grand Slam winner Kuznetsova in the Round of 16 follows back-to-back first-round exits at Wimbledon and the US Open.

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Kuznetsova is moving in the other direction, after entering the tournament at No. 75. She’s on a comeback from a right knee injury that ruled her out of the last US Open, ending a run of contesting 40 consecutive majors.

The 27-year-old Russian moved into a quarterfinal and will next face either No. 1-ranked Victoria Azarenka or Elena Vesnina.

Play on Day 7 ran into Day 8 overnight, when Novak Djokovic needed just over 5 hours to beat Stanislas Wawrinka, 1-6, 7-5, 6-4, 6-7 (5-7), 12-10 in a fourth-round match Sunday night, on the same court where he needed 5:53 to beat Rafael Nadal in last year’s final.

‘‘I just had flashback of 2012,’’ said Djokovic, who ripped off his shirt to celebrate again, like he did last year. ‘‘It was maybe 45 minutes less this match than the one 12 months ago, but still it was still as exciting. I tried to enjoy the moment and couldn’t ask for more. What a match point ... unbelievable.’’

The win was Djokovic’s 18th in a row at Melbourne Park after winning the last two Australian titles, and earned him a place in the quarterfinals of a 15th consecutive major.

Wawrinka said he would take more positives than negatives out of the match. He led, 5-2, in the second set after outplaying Djokovic in the first.

‘‘For sure, I think the best match I have ever played,’’ Wawrinka said. ‘‘I fought like a dog like always. At 4-4 in the final set, I thought I might have won the match, but he was just better.’’

Djokovic will next play No. 5 Tomas Berdych, who beat South Africa’s Kevin Anderson, 6-3, 6-2, 7-6 (15-13).

Fourth-seeded David Ferrer advanced, 6-2, 6-1, 6-4, over No. 16 Kei Nishikori of Japan to set up a quarterfinal against fellow Spaniard Nicolas Almagro.

Serena Williams, aiming for a third consecutive major title, will play her fourth-round match against No. 14 Maria Kirilenko of Russia later Monday.

Maria Sharapova, the reigning French Open champion, advanced to the quarterfinals with a 6-1, 6-0 win over Kirsten Flipkens, and has lost just five games through four rounds. That’s three fewer than the previous low mark at the Australian Open, held by Steffi Graf and Monica Seles.

‘‘A couple that I’ve won, I felt like I was playing great from the beginning and I was able to carry that through the whole tournament,’’ said Sharapova, who won titles in 2004 at Wimbledon, 2006 at the US Open, and 2008 in Australia.

She next plays fellow Russian Ekaterina Makarova, who beat fifth-seeded Angelique Kerber, 7-5, 6-4. Sharapova defeated Makarova in the quarterfinals here last year on her way to the final, which she lost in straight sets to Victoria Azarenka.

Li Na saved a set point in the tiebreaker before beating Julia Goerges, 7-6 (8-6), 6-1.

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