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Novak Djokovic has been clinical since the beginning of the Australian Open and reached his eighth consecutive quarter-final in Melbourne without dropping a set.
With just three matches between him and his fifth Australian Open trophy, the big question is whether anyone can stop him?
The next man to try end his flawless passage will be Milos Raonic. The Canadian prodigy will have to rely on his huge serve, which carried him through the draw so far against players like Feliciano Lopez and Benjamin Becker.
What should make the encounter interesting is the fact the two players know each other very well, and even spar together in Monte Carlo where they both live.
However, on the professional scene it is Djokovic who holds an advantage. In their four clashes to date 'Nole' has lost just one set.
The winner will face either Stan Wawrinka of Kei Nishikori in the semi-final.
Australian Open 2015 in picturesShow all 54 1 /54Australian Open 2015 in pictures Australian Open 2015 in pictures Novak Djokovic DEF Andy Murray Andy Murray looks on as Novak Djokovic holds the trophy
Australian Open 2015 in pictures Novak Djokovic DEF Andy Murray Novak Djokovic lifts his trophy
Australian Open 2015 in pictures Novak Djokovic DEF Andy Murray Andy Murray ponders what went wrong after the defeat
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Australian Open 2015 in pictures Serena Williams DEF Maria Sharapova Serena Williams wins the 2015 Australian Open
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Australian Open 2015 in pictures Serena Williams DEF Maria Sharapova Maria Sharapova was unable to cope with Serena Williams' power
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Australian Open 2015 in pictures Serena Williams DEF Maria Sharapova Serena Williams celebrates a point in her Australian Open victory over Maria Sharapova
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Australian Open 2015 in pictures Novak Djokovic DEF Stan Wawrinka Novak Djokovic consoles Stan Wawrinka after the match
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Australian Open 2015 in pictures Andy Murray DEF Tomas Berdych Andy Murray reaches the final of the Australian Open after beating Tomas Berdych in another impressive display, but the match was marred by ill feeling
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Australian Open 2015 in pictures Andy Murray DEF Tomas Berdych Tomas Berdych said something during the match which clearly angered Murray
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Australian Open 2015 in pictures Andy Murray DEF Tomas Berdych Andy Murray unleashes a forehand during his impressive victory over Tomas Berdych
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Australian Open 2015 in pictures Novak Djokovic DEF Milos Raonic Novak Djokovic (L) speaks with Canada's Milos Raonic after victory
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Australian Open 2015 in pictures Andy Murray DEF Nick Kyrgios Kim Sears watches on as her fiancé Andy Murray takes on Nick Kyrgios
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Australian Open 2015 in pictures Andy Murray DEF Nick Kyrgios Andy Murray celebrates a point against Nick Kyrgios
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Australian Open 2015 in pictures Andy Murray DEF Nick Kyrgios Andy Murray celebrates the victory over Nick Kyrgios in the Australian Open quarter-finals
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Australian Open 2015 in pictures Andy Murray DEF Nick Kyrgios Nick Kyrgios appeals a point during his quarter-final defeat to Andy Murray
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Australian Open 2015 in pictures Maria Sharapova DEF Eugenie Bouchard Eugenie Bouchard walks off the court holding back the tears after her Australian Open exit
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Australian Open 2015 in pictures Maria Sharapova DEF Eugenie Bouchard Maria Sharapova celebrates victory over Eugenie Bouchard in the Australian Open quarter-finals
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Australian Open 2015 in pictures Maria Sharapova DEF Eugenie Bouchard Maria Sharapova and Eugenie Bouchard shake hands after their Australian Open quarter-final clash
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Australian Open 2015 in pictures Tomas Berdych DEF Rafael Nadal Tomas Berdych shakes hands with Rafael Nadal after knocking the Spaniard out of the Australian Open
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Australian Open 2015 in pictures Tomas Berdych DEF Rafael Nadal Rafael Nadal suffered a straight-sets defeat to Tomas Berdych
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Australian Open 2015 in pictures Tomas Berdych DEF Rafael Nadal Tomas Berdych celebrates his victory over Rafael Nadal
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Australian Open 2015 in pictures Stan Wawrinka DEF Guillermo Garcia Lopez Stan Wawrinka signs autographs for fans after seeing off Guillermo Garcia-Lopez
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Australian Open 2015 in pictures Stan Wawrinka DEF Guillermo Garcia Lopez Stan Wawrinka came through his fourth round match against Guillermo Garcia-Lopez to reach the quarter-finals
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Australian Open 2015 in pictures Stan Wawrinka DEF Guillermo Garcia Lopez Guillermo Garcia-Lopez was unable to halt Wawrinka despite a third-set fightback
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Australian Open 2015 in pictures Serena Williams DEF Garbine Muguruza Serena Williams recovered from a set down to beat Garbine Muguruza
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Australian Open 2015 in pictures Serena Williams DEF Garbine Muguruza Serena Williams recovered from a set down to beat Garbine Muguruza
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Australian Open 2015 in pictures Dominika Cibulkova DEF Victoria Azarenka Victoria Azarenka was knocked out by Dominika Cibulkova
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Australian Open 2015 in pictures Dominika Cibulkova DEF Victoria Azarenka Dominika Cibulkova shocked Victoria Azarenka to reach the quarter-finals
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Australian Open 2015 in pictures Andy Murray DEF Joao Sousa Andy Murray celebrates his third round victory over Joao Sousa
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Australian Open 2015 in pictures Andy Murray DEF Joao Sousa Sousa was unable to trouble Murray as he lost in straight sets
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Australian Open 2015 in pictures Andy Murray DEF Joao Sousa Murray will face Grigor Dimitrov in the quarter-finals
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Australian Open 2015 in pictures Andy Murray DEF Joao Sousa Kim Sears can barely watch on as Murray battles Sousa
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Australian Open 2015 in pictures Eugenie Bouchard DEF Caroline Garcia Bouchard waves to the crowd following her victory over Caroline Garcia
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Australian Open 2015 in pictures Eugenie Bouchard DEF Caroline Garcia Eugenie Bouchard beat Caroline Garcia 7-5 6-0 to move into the fourth round
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Australian Open 2015 in pictures Eugenie Bouchard DEF Caroline Garcia Caroline Garcia was unable to stop Bouchard as she went down in straight sets
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Australian Open 2015 in pictures Andreas Seppi DEF Roger Federer Roger Federer shakes hands with Andreas Seppi after his third round elimination at the Australian Open
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Australian Open 2015 in pictures Andreas Seppi DEF Roger Federer Andreas Seppi celebrates his victory over Roger Federer
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Australian Open 2015 in pictures Andreas Seppi DEF Roger Federer Roger Federer reacts to defeat against Andreas Seppi
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Australian Open 2015 in pictures Serena Williams DEF Vera Zvonareva Serena Williams celebrates winning a point against Vera Zvonareva
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Australian Open 2015 in pictures Eugenie Bouchard DEF Kiki Bertens Eugenie Bouchard was asked to 'do a twirl' after her win over Kiki Bertens
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Australian Open 2015 in pictures Stanislas Wawrinka DEF Marius Copil Stan Wawrinka beat Marius Copil to progress to the third round
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Australian Open 2015 in pictures Novak Djokovic DEF Andrey Kuznetsov Novak Djokovic powered past the challenge of Andrey Kuznetsov
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Australian Open 2015 in pictures Novak Djokovic DEF Andrey Kuznetsov Novak Djokovic celebrates his straight-sets victory over Andrey Kuznetsov
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Australian Open 2015 in pictures Novak Djokovic DEF Andrey Kuznetsov Kuznetsov couldn't cope with Djokovic in the opening two sets as the Serbian asserted his dominance
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Australian Open 2015 in pictures Day 1 Australian fans cheer on during the first round match between Nick Kyrgios of Australia and Federico Delbonis of Argentina
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Australian Open 2015 in pictures Lucie Hradecka DEF Ana Ivanovic Lucie Hradecka stunned Ana Ivanovic with a 6-1 3-6 2-6 victory
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Australian Open 2015 in pictures Lucie Hradecka DEF Ana Ivanovic Ivanovic screams out in anger after her defeat to Hradecka
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Australian Open 2015 in pictures Lucie Hradecka DEF Ana Ivanovic Ana Ivanovic slides on the Rod Lever Arena court surface during her surprise defeat to Hradecka
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Australian Open 2015 in pictures Rafael Nadal DEF Mikhail Youzhny Rafael Nadal shakes hands with Mikhail Youzhny after his first round victory
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Australian Open 2015 in pictures Rafael Nadal DEF Mikhail Youzhny Nadal celebrates after his first round victory
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Australian Open 2015 in pictures Rafael Nadal DEF Mikhail Youzhny Nadal needed just 1 hour and 49 minutes to defeat Youzhny and move into the second round
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Australian Open 2015 in pictures Andy Murray DEF Yuri Bhambri Andy Murray beat Yuri Bhambri in the first round 6-3, 6-4, 7-6
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Australian Open 2015 in pictures Andy Murray DEF Yuri Bhambri Andy Murray and Yuri Bhambri shake hands after the former's first round victory
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Australian Open 2015 in pictures Andy Murray DEF Yuri Bhambri Murray's first round victory wasn't his most convincing victory of his career
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Start: Wednesday, Rod Laver Arena, 8.30 am GMT
PAST MEETINGS…
2014 – Paris (Hard) Djokovic won 6-2, 6-3
2014 - Roland Garros (Clay) Djokovic won 7-5, 7-6, 6-4
2014 – Rome (Clay) Djokovic won 6-7, 7-6, 6-3
STATS…
Djokovic reached his 23rd Grand Slam quarter-final in a row.
This will be Raonic’s first appearance in the quarter-finals in Melbourne.
Djokovic has dropped 41 games in the first four rounds, while Raonic – 61.
Raonic had the most aces in the tournament after four rounds (99). He needs to serve another seven against Djokovic to overcome the current leader - Nick Kyrgios.
Raonic is the first Canadian to reach an Australian Open quarter-final since 1968.
ODDS…
Djokovic to win 1.11
Raonic to win 5.50
TV: British Eurosport
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