Novak Djokovic needed five hours and two minutes to outlast No. 15 Stanislas Wawrinka, winning 1-6, 7-5, 6-4, 6-7, 12-10 to claim the longest match of this year's Australian Open and advance to the quarterfinals.
2 of 15Peter Parks/AFP/Getty Images
No. 5 Angelique Kerber was ousted 7-5, 6-4 by No. 19 Ekaterina Makaraova, the same woman who upset Serena Williams last year.
3 of 15Vince Caligiuri/Getty Images
No. 13 Milos Raonic takes a photo of the view at Eureka Skytower in Melbourne.
4 of 15Peter Parks/AFP/Getty Images
No. 4 David Ferrer beat No. 16 Kei Nishikori 6-2, 6-1, 6-4 in the fourth round Sunday.
5 of 15Dita Alangkara/AP
Nishikori, a quarterfinalist last year, had a boisterous contingent of fans at Melbourne Park.
6 of 15Aaron Favila/AP
Ferrer reached his third straight Australian Open quarterfinal.
7 of 15Lucas Dawson/Getty Images
1987 Wimbledon champion Pat Cash takes part in a legends doubles match.
8 of 15Scott Barbour/Getty Images
The top-ranked Bryan brothers moved a step closer to their sixth Australian Open title, beating Jeremy Chardy and Lukasz Kubot 6-7, 6-4, 6-3.
9 of 15Julian Finney/Getty Images
No. 2 Maria Sharapova beat Kirsten Flipkens 6-1, 6-0 and will play Makarova next.
10 of 15Greg Wood/AFP/Getty Images
No. 10 Nicolas Almagro advanced to the quarterfinals when No. 8 Janko Tipsarevic retired at 6-2, 5-1. He'll face Ferrer.
11 of 15Rob Griffith/AP
Tipsarevic retired with a left foot injury.
12 of 15Michael Dodge/Getty Images
Ball kids play cricket with a shoe.
13 of 15Greg Wood/AFP/Getty Images
No. 6 Li Na beat No. 18 Julia Goerges 7-6 (6), 6-1 to make her first Grand Slam quarterfinal since winning the 2011 French Open.
14 of 15William West/AFP/Getty Images
No. 4 Agnieszka Radwanska will play Li after dumping No. 13 Ana Ivanovic 6-2, 6-4.
15 of 15Andy Wong/AP
No. 5 Tomas Berdych beat Kevin Anderson 6-3, 6-2, 7-6 (13) to make his third straight Australian Open quarterfinal.
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