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Andy Murray stayed up late into the night to watch brother Jamie clinch Australian Open glory on Saturday night - and expects stamina to prove the key in his bid to make it a family double against Novak Djokovic in Melbourne.
The younger Murray was urged to head back to bed by his brother after being spotted taking court-side photographs in the wake of Jamie's doubles victory just hours before his own grand slam final against the Serbian world number one.
And Murray knows he is likely to have to prepare for another long haul if he is to overcome Djokovic one once more and clinch the title Down Under for the first time in his career.
Murray said: "The most important thing for me is to sustain my level for long enough, not just for one set here or there, a few games here or there.
"I need to do it for a very long period if I want to get the win. That's my challenge on Sunday."
In his on-court speech shortly after his victory alongside new partner Bruno Soares, an emotional Jamie told his brother: "Andy you should be in bed, I don't know why you're here taking photos."
And despite the prospect of a family double Jamie sought to distance himself from the hype, insisting a third major title for Andy would be very much a singular achievement.
"I just want him to win," insisted Jamie. "I don't care for history or whatever like that. I just want him to win for himself.
"I know how much hard work he puts in all the time through his career, the sacrifices that he's made, how much he's dedicated himself to his career."
Djokovic does not need convincing that Murray will be hungrier than ever to reverse his current streak of four consecutive defeats in grand slam finals.
And while Murray has only beaten the Serbian once in their last 11 meetings, he might take inspiration from his rival the other side of the net.
Djokovic lost five out of six major finals between 2012 and 2014, and the world number one is still yet to triumph at the French Open, losing his third final at Roland Garros to Stan Wawrinka last year.
"I've played him many times and been in the situation before where I haven't won specific tournaments," Djokovic said.
"Like Roland Garros for example, against players like (Rafael) Nadal who were dominating there.
"So I understand the kind of desire and will to win that is present. But of course I don't underestimate him. No question about it.
"I have a tremendous respect and admiration for everything he's achieved in his career. He's one week older than me so we grew up together.
"We have very similar styles of game and a very similar trajectory to professional tennis, so it's nice to see that our rivalry keeps on going and we keep playing for the biggest titles."
Djokovic is gunning for his sixth Australian Open title and 11th overall while Murray is bidding to add to his triumphs at the US Open in 2012 and Wimbledon in 2013.
The odds favour the top seed, who was in irresistible form against Federer on Thursday and has lost only once in his last 34 grand slam matches. It is not inconceivable he could win all four major tournaments in 2016.
"When I hear predictions that are positive, of course it does flatter and add to your confidence," Djokovic said.
"But you can't get carried away with that. It also imposes a great obstacle mentally in a way because you need to deliver.
"I'm expecting a battle with Andy, as it always is, a very physically demanding match. Lots of rallies, exchanges.
"It's no secret we know how we play against each other. It's two games that are very much alike, so it's basically who's going to outplay who from the baseline."