Australian Open 2021: Stefanos Tsitsipas survives a marathon as No. 1 Barty cruises and more
Young Stefanos Tsitsipas of Greece survived a marathon five-set match against Thanasi Kokkinakis of Australia to move into the third round of the Australian Open. In other major matches, world No. 1 Ashleigh Barty and No. 6 seed Karolina Pliskova of Czech Republic posted easy wins in the second round in Melbourne on Thursday. Here we take a look at some of the top action from Day 4 of the Australian Open.
Elina Svitolina
![Elina Svitolina](https://english.cdn.zeenews.com/sites/default/files/2021/02/11/916283-elina-svitolina-day4.jpg?im=Resize=(400))
Elina Svitolina of Ukraine in action against American Coco Gauff in Australian Open 2021 second round. The fifth seeded Svitolina cruised into the third round with a 6-4, 6-3 win over Gauff. (Source: Twitter)
Stefanos Tsitsipas
![Stefanos Tsitsipas of Greece returns to Thanasi Kokkinakis of Australia in their marathon second round match at Australian Open 2021. (Source: Twitter)](https://english.cdn.zeenews.com/sites/default/files/2021/02/11/916277-tsitsipas-day4.jpg)
Stefanos Tsitsipas of Greece returns to Thanasi Kokkinakis of Australia in their marathon second round match at Australian Open 2021. The only player from Greece to reach a Grand Slam semi-final, Tsitsipas paid tribute to his friend Kokkinakis, who celebrated his first Australian Open win in six years on Tuesday after battling injuries and illness. (Source: Twitter)
Kristina Mladenovic
![Kristina Mladenovic is all smiles after her win over Nao Hibino of Japan in Australian Open 2021 second round. (Source: Twitter)](https://english.cdn.zeenews.com/sites/default/files/2021/02/11/916276-mladenovic-day4.jpg)
Kristina Mladenovic is all smiles after her win over Nao Hibino of Japan in Australian Open 2021 second round. Mladenovic from France posted an easy 7-5, 6-1 victory. (Source: Twitter)
Karolina Pliskova
![Karolina Pliskova from Czech Republic exults after her win over Danielle Rose Collins of the US in the Australian Open 2021 second round. (Photo: Reuters)](https://english.cdn.zeenews.com/sites/default/files/2021/02/11/916275-karolina-pliskova-day4.jpg)
Karolina Pliskova from Czech Republic exults after her win over Danielle Rose Collins of the US in the Australian Open 2021 second round. The sixth seed won 7-5, 6-2 and served up seven aces. (Photo: Reuters)
Ashleigh Barty
![World No. 1 Ashleigh Barty celebrates after her win over Australian compatriot Daria Gavrilova in the second round. (Photo: Reuters)](https://english.cdn.zeenews.com/sites/default/files/2021/02/11/916273-ash-barty-day4.jpg)
World No. 1 Ashleigh Barty celebrates after her win over Australian compatriot Daria Gavrilova in the second round. Barty defeated Gavrilova 6-1, 7-6 (9) in a battle between home town heroes in Melbourne. (Photo: Reuters)
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