History was made this morning as Louk Sorensen became the first Irish tennis player to ever win a grand slam match.
Sorensen (25) has hailed the victory as the "biggest achievement of his career" in the aftermath of his stunning victory at the Australian Open in Melbourne.
He was raised in Germany but considers himself Irish, with his parents now living in Dalkey, Dublin.
Sorensen lives in Stuttgart, training and playing in the German tennis league's third division.
Louk Sorensen beat Taiwan's Lu Yen-Hsun 6-4 3-6 6-2 6-1 in his first ever game at the highest level.
He became the first Irish man to compete in a grand slam in over 20 years, after he won a place in the competition through a series of qualifying tournaments.
Speaking after his amazing performance, Sorensen described how he has suddenly been plucked from obscurity and plunged into the spotlight.
"I don't know what's going on right now," he told a news conference. "I've suddenly got so many friend requests on Facebook.
"I'm feeling great, it's the biggest achievement of my career so far," Sorenson added. "I think it was an advantage to come through the qualifiers because I was used to the courts.
"The level between the qualifiers and the main draw, there is not such a big difference. You just need a bit of luck."
His next challenge will be a real David versus Goliath contest as he takes on American giant John Isner.
Sorensen, who stands five feet 10 inches tall, is one of the shortest men at the Australian Open, while Isner, at six feet 10 inches, is one of the tallest.
Louk was following in the footsteps of his ex-tennis player father, Sean.
Before this morning's breakthrough win, Louk was best known as the son of Sean Sorenson, the current captain of the Ireland Davis Cup team, who played in the first round of Wimbledon in 1977, losing to Rod Laver.
Speaking this morning, CEO of Tennis Ireland Des Allen was amazed at just how easily Louk dispatched his much-fancied opponent.
"It was real nerve-ending stuff," he said.
"He really ripped through the latter two sets quickly and efficiently.
"I was amazed it ended in relatively easy fashion for Louk."
He admitted that there were some nervous moments but Louk seemed to mature on court to see out the win on his fifth match point.
"I thought when he lost the second set, the momentum would swing and the game would go to five sets.
"Louk just seemed to get down to business," he gleamed.
Sorensen's career earnings to date are just €78,000.