Having turned 19 last year, Rafael Jodar only turned professional in December.
On Friday evening at the Caja Magica in Madrid, he dismantled world number eight Alex de Minaur 6-3, 6-1 in just 75 minutes to claim the biggest win of his fledgling career, sending the home crowd into raptures in the process.
The numbers surrounding Jodar's start to professional life are almost impossible to believe.
He has now won 17 of his first 25 matches as a professional, a record that surpasses the opening stretches of Roger Federer, Rafael Nadal, Novak Djokovic, Carlos Alcaraz and Jannik Sinner at the same stage.
Nadal is the closest among that group, having won 15 of his first 25 matches alongside Joao Fonseca, but even he falls short of what the Madrid-born teenager has managed. A year ago, Jodar was ranked outside the top 700 in the world. He is currently 34th.
"Everything is happening very fast," Jodar said after the win.
"I'm playing lots of matches and tournaments. It gives me the chance to compete against many players at a high level and improve my tennis. When you face the best players on tour, you really raise your level."
The win over de Minaur was his first career victory over a top-10 player and it came with a composure that belied his age and experience. Playing on the Manolo Santana Centre Court in front of a sold-out crowd cheering his every point, Jodar controlled the match from start to finish.
He won 34 return points to de Minaur's 19, converted six of 13 break-point opportunities and took 61 percent of first-serve return points.
In the second set he outscored the Australian 23-7 on return points, an extraordinary dominance on a surface where de Minaur, a fast court specialist, has always struggled.
World number one Jannik Sinner was in the stands watching the match unfold, a sign of how seriously the tennis world is already taking the teenager.
After Friday's win, Jodar will face Brazilian sensation Joao Fonseca in the third round on Sunday, a clash between the two leading players in the ATP Live Next Gen Race and potentially the most exciting match of the tournament's early rounds.
From Morocco to Madrid
Jodar arrived in Madrid on the back of an already remarkable clay swing. He claimed his first ATP title in Marrakech at the start of the clay season, and reached the semifinals in Barcelona the following week.
Even Carlos Alcaraz, who has since withdrawn from both Rome and Roland Garros with a wrist injury, took the time to send Jodar a personal message after the Marrakech victory.
In his first-round match at Madrid, Jodar had to fight back from a difficult situation before coming through.
By Friday he was operating on an entirely different level, barely putting a foot wrong over 75 minutes and leaving de Minaur, the fifth seed and one of the most athletic players on tour, with nowhere to go.
"The first match helped me a lot to adapt to the conditions in Madrid," Jodar said.
"I came from something very different in Barcelona. It did me good to get used to the Manolo Santana court. That doesn't mean the next one will be any less tough. It'll be very challenging. Tomorrow I'll try to have a good practice day and approach Sunday's match with the same mindset."