Stefanos Tsitsipas produced a major shock in the fourth round of the Australian Open ©Getty Images

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The Greek player earned a four set win over Roger Federer to reach the last eight ©Getty Images
The Greek player earned a four set win over Roger Federer to reach the last eight ©Getty Images
The result ended Roger Federer's hopes of a third consecutive Australian Open title ©Getty Images
The result ended Roger Federer's hopes of a third consecutive Australian Open title ©Getty Images
Rafael Nadal continued to ease through the rounds ©Getty Images
Rafael Nadal continued to ease through the rounds ©Getty Images
The second seed secured a fourth consecutive straight sets win ©Getty Images
The second seed secured a fourth consecutive straight sets win ©Getty Images
Australian hopes were resting on Ashleigh Barty in the women's singles ©Getty Images
Australian hopes were resting on Ashleigh Barty in the women's singles ©Getty Images
The home favourite came from a set down to beat Maria Sharapova ©Getty Images
The home favourite came from a set down to beat Maria Sharapova ©Getty Images
World number two Angelique Kerber suffered a surprise defeat ©Getty Images
World number two Angelique Kerber suffered a surprise defeat ©Getty Images
Danielle Collins marked her first Australian Open main draw appearance by reaching the quarter-finals ©Getty Images
Danielle Collins marked her first Australian Open main draw appearance by reaching the quarter-finals ©Getty Images
Petra Kvitova was also among the winners in the fourth round of the competition ©Getty Images
Petra Kvitova was also among the winners in the fourth round of the competition ©Getty Images