Novak Djokovic has reached his 23rd consecutive Grand Slam tennis quarter-final.
The Serb is into the last eight of the Australian Open after beating Luxembourg's Gilles Muller in straight sets, 6-4, 7-5, 7-5 .
Seven-time major winner Venus Williams is through to her first Grand Slam quarter-final since 2010 following her three-set win over Agnieszka Radwanska.
There were also victories for Williams' sister, Serena, defending men's champion Stan Wawrinka, and Kei Nishikori.
47,650 fans took in the sights and sounds of Melbourne Park today - a massive thanks to each of you #ausopen pic.twitter.com/3ZudiKlxDA
— Australian Open (@AustralianOpen) January 26, 2015
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