Australian Open Day 2: Rafael Nadal and Simona Halep among first-round casualties – in pictures

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  Australia's Bernard Tomic signs autographs after winning his first round match against Uzbekistan's Denis Istomin at the Australian Open tennis tournament at Melbourne Park, Australia, January 19, 2016. REUTERS/Issei Kato

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  Venus Williams of the United States makes a backhand return to Johanna Konta of Britain during their first round match at the Australian Open tennis championships in Melbourne, Australia, Tuesday, Jan. 19, 2016.(AP Photo/Aaron Favila)

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  Germany's Alexander Zverev runs after the ball during his first round match against Britain's Andy Murray at the Australian Open tennis tournament at Melbourne Park, Australia, January 19, 2016. Picture taken through netting. REUTERS/Jason O'Brien

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  Czech Republic's Karolina Pliskova serves during her first round match against Australia's Kimberly Birrell at the Australian Open tennis tournament at Melbourne Park, Australia, January 19, 2016. REUTERS/Issei Kato

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  France's Gael Monfils serves during his first round match against Japan's Yuichi Sugita at the Australian Open tennis tournament at Melbourne Park, Australia, January 19, 2016. REUTERS/Brandon Malone

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  Andy Murray of Britain serves to Alexander Zverev of Germany during their first round match at the Australian Open tennis championships in Melbourne, Australia, Tuesday, Jan. 19, 2016.(AP Photo/Andrew Brownbill)

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  Spain's Tommy Robredo leans on the net after winning his first round match against Tunisia's Malek Jaziri at the Australian Open tennis tournament at Melbourne Park, Australia, January 19, 2016. REUTERS/John French

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  Andy Murray of Britain in action against Alexander Zverev of Germany during their first round match on day two of the Australian Open tennis tournament in Melbourne, Australia, 19 January 2016. EPA/LUKAS COCH AUSTRALIA AND NEW ZEALAND OUT

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  Tunisia's Malek Jaziri reacts after missing a shot during his first round match against Spain's Tommy Robredo at the Australian Open tennis tournament at Melbourne Park, Australia, January 19, 2016. REUTERS/John French

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  Anastasija Sevastova of Latvia hits a backhand return to Jarmila Wolfe of Australia during their first round match at the Australian Open tennis championships in Melbourne, Australia, Tuesday, Jan. 19, 2016.(AP Photo/Andrew Brownbill)

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  Andy Murray of Britain returns the ball to Alexander Zverev of Germany during the first round match of the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 19 January 2016. EPA/FILIP SINGER

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  Spectators watch the first round match between Spain's Rafael Nadal and Spain's Fernando Verdasco at the Australian Open tennis tournament at Melbourne Park, Australia, January 19, 2016. REUTERS/Jason O'Brien

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  Australia’s Lleyton Hewitt reacts after a point during his men’s singles match against compatriot James Duckworth on day two of the 2016 Australian Open tennis tournament in Melbourne on January 19, 2016. AFP PHOTO / WILLIAM WEST

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  John Isner of the United States walks off the court after winning his first round match against Jerzy Janowicz of Poland during day two of the 2016 Australian Open at Melbourne Park on January 19, 2016 in Melbourne, Australia. (Photo by Quinn Rooney/Getty Images)

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  Ana Ivanovic of Serbia during a break of her first round match against Tammi Patterson of Australia at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 19 January 2016. EPA/FILIP SINGER reacts during the first round match agains

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  Alexander Zverev of Germany returns the ball to Andy Murray of Britain in their first round match of the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 19 January 2016. EPA/LUKAS COCH

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  China's Zhang Shuai cries after winning her first round match against Romania's Simona Halep at the Australian Open tennis tournament at Melbourne Park, Australia, January 19, 2016. REUTERS/Jason Reed

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  An Australian fan watches the first round match between Annika Beck of Germany and Priscilla Hon of Australia at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 19 January 2016. EPA/JOE CASTRO

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  Rafael Nadal, right, of Spain is consoled by compatriot Fernando Verdasco after his first round loss to Verdasco at the Australian Open tennis championships in Melbourne, Australia, Tuesday, Jan. 19, 2016.(AP Photo/Mark Baker)

Rafael Nadal and Simona Halep were sent crashing out of the Australian Open first round on Tuesday as a dramatic day of upsets shifted the landscape of the year's first grand slam.

Andy Murray and rising star Garbine Muguruza marched on to the second round.

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