However, Casper Ruud's father Christian claims that Rune is lying about the incident in the locker room.
"It is simply a lie," writes Christian Ruud in a message to NRK.
Ruud, who won the late quarter-final match at Roland Garros, says after the match that the 19-year-old Dane screamed and gaped during the match and did not thank for the match properly.
- He is young and new, so it can be excused.
But if you are on a big stage, it may be time to grow up a little.
I think you can show a little respect for the opponent.
What he showed today is not so much respect in my world, says the 23-year-old Ruud to, among others, the Norwegian newspaper VG.
"Show some respect"
Rune, on the other hand, thinks that Ruud does not show respect when he walks up to the Dane in the dressing room and shouts straight up in his face.
- I was just thinking, what the hell are you doing?
This is not how you do it.
You can celebrate the victory as much as you like on the track, I do it myself when I win.
But this is such a bad style.
Show a little respect, says Rune to Danish Ekstra-Bladet.
It was also irritating between the players during the match when Rune asked the referee to check the impact marks.
Ruud then said to Rune that "should you check all the brands?".
- Then I told him not to talk to me, says Rune.