Novak Djokovic described it as a day to forget after the Serb made 100 unforced errors in his battling five-set win over Gilles Simon at the Australian Open.
Djokovic was far from his metronomic best at Rod Laver Arena as he missed 51 forehands, 48 backhands and was broken four times.
Simon, however, was unable to capitalise as the world number one dug deep to grind out a 6-3 6-7 (1/7) 6-4 4-6 6-3 victory and book a quarter-final match-up with Japan's Kei Nishikori.
"I was obviously pleased to win the match. The last point counts. But in terms of the performance itself, I haven't done well at all," Djokovic said.
"I honestly didn't expect to make this many unforced errors. In terms of a level that I've played, it's the match to forget for me."
Andy Murray has made almost half as many unforced errors (63) in his opening three matches put together as Djokovic managed against the Frenchman.
Asked if he could remember a similar performance, Djokovic said: "Not even close. No, I don't think I've had any close number to a hundred.
"But, again, there is a first time for everything."
Kyle Edmund has secured a place in the main draw of the Australian Open following Richard Gasquet's withdrawal.
When the entry lists were released earlier this month, British number three Edmund was three spots outside automatic qualification.
But world number nine Gasquet, who is suffering with a back injury, has joined Juan Monaco and Australian youngster Thanasi Kokkinakis in pulling out of the year's first grand slam, which begins on January 18th.
Novak Djokovic has secured his 25th career Grand Slam semi-final after a convincing straight sets victory over Milos Raonic.
The four times Australian Open winner will face Stan Wawrinka, who earlier defeated Kei Nishikori.
World number one Djokovic needed a tie break to claim the first set, but went on to break his 24 year-old Canadian opponent early in the second and third sets to claim a 7-6 (7-5) 6-4 6-2 victory.
Eighth seed Raonic, who pushed deep at the grand slams last year, was supposed to offer the first real test for the top-seeded Serb but was completely outclassed under the lights at Rod Laver Arena.
It was the first time Djokovic has booked his place in the Australian Open semi-finals without dropping a set since 2008.
Andy Murray saw off Nick Kyrgios in three sets to progress to the Australian Open semi-finals where he will face Tomas Berdych.
The Scot took control early on in the match, winning the first set 6-3.
Kyrgios fought back, but lost out in a tie-break to Murray in the second.
Once Murray broke to make it 4-2 in the third, the British No.1 had almost sealed the victory, eventually taking the final set 6-3.
Andy Murray has beaten Australian Marinko Matosevic in straight sets in the second round of the Australian Open.
The final score was: 6-1, 6-3, 6-2.
Top seed Novak Djokovic and defending champion Stan Wawrinka wasted no time in booking their place in the second round of the Australian Open on Tuesday.
While a record-equalling 11 seeds crashed out of the women's singles in the first round, Djokovic and Wawrinka made short work of their opening opponents in Melbourne.
Djokovic, who is seeking to become the second man in history to win five or more titles in the year's first grand slam, defeated Slovenian qualifier Aljaz Bedene 6-3 6-2 6-4 in an hour and 49 minutes, while Wawrinka needed just 89 minutes to dispatch Turkey's Marsel Ilhan 6-1 6-4 6-2.
Andy Murray blasted his own performance and cracked a racket despite a straight sets victory in his opening round of the Australian OpenRead the full story ›
Andy Murray will play a qualifier in the Australian Open first round and has avoided meeting Novak Djokovic until the finalRead the full story ›
Britain's Andy Murray has been seeded sixth for the first grand slam of 2015, the Australian Open, which gets under way on Monday.
Murray, three times a finalist in Melbourne, reached the quarter-finals 12 months ago in his first grand slam since undergoing back surgery the previous September.
Murray will discover his first-round opponent at Friday's draw, which will be attended by defending champions Wawrinka and Li Na, who was forced to retire last September because of persistent knee injuries.
Injury has ruled 2008 finalist Jo-Wilfried Tsonga out of this month's Australian Open.
The big-serving Frenchman will receive at least three weeks of treatment for inflammation in his right forearm.