Murray's epic 4am finish defended by Australian Open boss

Australian Open chief Craig Tiley insisted on Friday there was "no need" to alter scheduling at the tournament despite stinging criticism after the second latest match finish at a Grand Slam.

Veteran Andy Murray battled through a five-set epic against home hope Thanasi Kokkinakis which ended at 4:05 am Friday to reach the third round, calling the early hours conclusion "a bit of a farce".

"I don't know who it's beneficial for. A match like that, we come here after the match, and that's what the discussion is," the 35-year-old Briton said after the five hours and 45 minutes spectacle, the longest of his career.

"Rather than it being, like, 'epic Murray-Kokkinakis match', it ends in a bit of a farce."

Incredibly, Murray was spotted back at Melbourne Park less than eight hours after the match, with Kokkinakis taking to Instagram to be pay tribute.

"You're a warrior Andy Murray and a honour to share the court with you," he said.

The latest finish in the Open era was also at the Australian Open, in 2008 when Lleyton Hewitt outlasted Marcos Baghdatis in a third-round clash that ended at 4:34 am.

Tennis great Martina Navratilova said "no other sport does this".

"It is essential we create better rules in tennis regarding the weather (light and wind) and starting times or cut-off times for matches," she tweeted.

"Murray and Kokkinakis will finish around 4am. Crazy - no other sport does this."

Murray's brother Jamie, a doubles specialist who is also playing at Melbourne Park, joined the chorus of criticism, saying it was time to move to just one match in night sessions at Grand Slams.

"This is the best outcome for ALL singles players," he tweeted.

"We can't continue to have players compete into the wee hours of the morning. Rubbish for