LOOK! Australian Open day 5 - Osaka crashes out, Barty and Nadal through to next round

Amanda Anisimova of the US celebrates after beating Japan's Naomi Osaka in their women's singles match on day five of the Australian Open tennis tournament in Melbourne.

Osaka reacts during her third round defeat. The Japan star crashed out 4-6 6-3 7-6 (10-5) to the American who is ranked 60th in the world.

Spain's Rafael Nadal celebrates after winning the match against Russia's Karen Khachanov 6-3 6-2 3-6 6-1 during their men's singles match on day five.

Ash Barty of Australia waves as she is interviewed after defeating Camila Giorgi of Italy in their third round match.

Germany's Alexander Zverev celebrates winning his third round match against Moldova's Radu Albot.

Denis Shapovalov, the 14th seed, sealed a 7-6(4) 4-6 6-3 6-4 victory over Reilly Opelka to make the fourth round at Melbourne Park for the first time in his career.

Madison Keys of the US plays a forehand return to Wang Qiang of China during their third round match. Keys came from a set down to claim a 4-6 6-3 7-6(10-2) win to book her place in the fourth round. The American, a former semi-finalist at Melbourne Park, plays eighth seed Paula Badosa next.

Eighth seed Paula Badosa, who emerged as a contender for a maiden Grand Slam title after winning the Sydney Tennis Classic last week, edged past Marta Kostyuk 6-2 5-7 6-4 to reach the fourth round for the first time.

A determined Barbora Krejcikova fought back from a set and a break down to overcome Jelena Ostapenko 2-6 6-4 6-4 in a battle between former French Open champions on Rod Laver Arena.

Last year's quarter-finalist Jessica Pegula shook off a slow start to get past Nuria Parrizas Diaz 7-6(3) 6-2 and reach the fourth round, where the American will face fifth seed Maria Sakkari, who beat an ailing Veronika Kudermetova 6-4 6-1.

Two-time Australian Open winner Victoria Azarenka handed number 15 seed Elina Svitolina a comprehensive 6-0 6-2 defeat to advance to the fourth round.

2016 quarter-finalist Gael Monfils moved past 16th seed Cristian Garin 7-6(4) 6-1 6-3.