John Millman has scored one of the biggest wins of his career by eliminating world No.16 and No.12 seed Hubert Hurkacz at the Madrid Open.
The Australian, who is ranked 42 in the world, came from behind to upset the Polish star 5-7 7-6 (9-7) 6-3 to advance.
Their battle lasted little more than two hours and 20 minutes before Millman closed out the match.
The 31-year-old Queenslander will now meet Englishman Daniel Evans, who triumphed Frenchman Jeremy Chardy 7-6 (8-6) 6-7 (9-7) 6-2.
It could be a big day for Australia with Alex de Minaur and Alexei Popyrin also in action.
De Minaur will take on South African Lloyd Harris while Popyrin made a fine start against Germany's Jan-Lennard Struff, taking the first set 6-3.
Meanwhile top seed Rafael Nadal will meet Carlos Alcaraz, the boy he once gave a PlayStation to as a prize at a local tennis tournament in Spain.
The Spanish great is scheduled to play against the promising youngster in the second round after the young star defeated Adrian Mannarino 6-4 6-0 for his maiden ATP Masters 1000 match win.
to set up the meeting with 20-time grand slam champion Nadal.
The result made the 120th-ranked Alcaraz the youngest match winner in Madrid - eclipsing 18-year-old Nadal's record from 2004.
Alcaraz will face his idol, the winner of 20 grand slam titles, on the Magic Box centre court on Wednesday, his 18th birthday.
"For me, (to) play against Rafa is a dream come true," Alcaraz said.
"Since I was a kid, I wished to play a match against Rafa and now I will be able to ... It is a really special match against Rafa."
Alcaraz, who is competing in Madrid as a wildcard, turned pro in 2018 and has been considered by many as Spain's successor to 34-year-old Nadal.
They practised together at the Australian Open, where Alcaraz reached the second round.
He won the under-12 title in Madrid in 2015, and two years later reached the final in the under-16 event.
A few years ago, Alcaraz and other kids received PlayStations from Nadal after competing in a tournament.
"I'll try to be as relaxed as possible," Alcaraz said.
"I'll try to play my game and to keep learning and keep having fun."
World No.2 Nadal, who has an opening-round bye, will be chasing his sixth title in the Spanish capital after claiming his 87th tour-level title in Barcelona last month.