Former French Open finalist Alex Corretja believes 'a star has been born' at Roland Garros this year in Holger Rune.
Rune, an unseeded 19 year old, took down fourth seed and last year's runner-up Stefanos Tsitsipas in the round of 16 on Monday to earn him a quarter-final shot against Casper Ruud.
It was a stunning performance from Rune, full of fearless powerful hitting backed up by an astute tactical plan.
Corretja, who used to coach Andy Murray, said it was impossible not to be impressed with what Rune delivered.
"A star is born," Corretja told Eurosport of Rune. "Holger was playing extremely well.
"He was just hitting the ball as hard as he could. He was serving perfect, but also like his backhand.
"I mean, it amazes me the way he was just playing and dealing with the whole situation because it's packed and everybody was watching that match and he was enjoying it so much.
"So we have this new generation with no fear, they have fun on the court, they just go for it.
"To beat Tsitsipas you have got to be super good and I think he [Rune] is super good. He has so much confidence in his game. His forehand was big.
"His backhand was just perfect. And his serve - it's very deep, sometimes it's not too hard, but it comes very high to the opponents.
"I think for Stefanos, he was killing him on his backhand."
Rune will face eighth seed Casper Ruud in the quarter-final with the winner playing either Andrey Rublev or Marin Cilic for a spot in the final.