Alex de Minaur is having a sensational start to 2019, winning the Sydney International on the weekend, before claiming a straight sets win in the first round of the Australian Open on Monday.
The 19-year-old was far too good for Portugal's Pedro Sousa on Rod Laver Arena, earning a 6-4 7-5 6-4 win to advance to the second round.
De Minaur will take on either Mirza Basic or Henri Laaksonen in the second round on Wednesday, where he will continue to showcase the work he did over the off-season.
Speaking after his first round victory, de Minaur revealed more details about the gruelling training block he underwent ahead of the summer of tennis.
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"I'm very proud of the work we did in the off-season," he said.
"To be able to back up day after day, we did a lot of running, bike, boxing - which I'm not very good at - swimming, which I need my floaties.
"But I'm glad it's paying off and I'm really happy with my team and the work we put in."
The hard work is paying off in spades, with de Minaur forced to play two matches in one day to claim his maiden ATP title in Sydney on Saturday.
After rain delayed the start of his semi-final against Gilles Simon, the pair returned to Sydney Olympic Park on Saturday afternoon, with the Aussie earning a straight sets win.
He then came back just six hours later to beat Italian Andreas Seppi 7-5 7-6(5) in front of an ecstatic home crowd.
While the off-season fitness regime is bearing fruit, the jury is still out on de Minaur's other big off-season accomplishment, which was finally getting his driver's license.
"I must say, if you see me driving, you'll want to watch out," he joked.
"I'm not the best driver. I've recently got my license, literally a couple of months ago.
"I'm very happy about that, it's probably one of the biggest wins of my career."
Ranked 29th in the world after going one better in Sydney than he did last year, de Minaur wasn't happy with having to play in the Melbourne heat just two days after Saturday's gruelling day out.
“I think they’re punishing Aussies for playing deep in their home tournaments, and I think that should not be what they should be doing,” he told reporters after his Sydney success.
“… They came out with the schedule before they even saw the halves or saw who was in the finals the week prior - I think that’s pretty poor.”
De Minaur was seen cooling himself down with a towel full of ice as temperatures soared in Melbourne.
He will return to Melbourne Park on Wednesday for his second round match, with a possible third round showdown with Rafael Nadal on Friday.
On the back of a breakout summer last year, de Minaur was knocked out of his home slam in the first round last year by Tomas Berdych. Having starred in Brisbane and Sydney in the weeks prior, the then 18-year-old took the first set off Berdych, but couldn't keep up with the Czech veteran.
After Kyle Edmund knocked him out in the first round of the French Open in straight sets, de Minaur made consecutive third round appearances at Wimbledon and the US Open.
The Australian defeated Marco Cecchinato and Pierre-Hughes Herbert at Wimbldeon before Nadal ended his tournament with a 6-1 6-2 6-4 win.
In the last slam of the year, de Minaur bested Taro Daniel in straight sets in the first round, and Frances Tiafoe in four sets in the second.
The Demon then played a five-set epic against Marin Cilic, coming from 2-0 down to force a fifth before the Croatian - who was runner-up at the Australian Open - won 6-4 6-3 3-6 4-6 5-7.