As he approached the net on match point, Draper played an odd-looking volley that landed just over the net. Referee Greg Allensworth awarded the point and the match to the Englishman.

However, Auger-Aliassime was convinced that the shot ricocheted on Draper’s side of the pitch.

A long debate ensued and Draper claimed he was unsure whether the ball had bounced on his side of the pitch.

“If there was a replay, I would repeat it, but I don’t know… I’ve been watching you,” the Briton told Auger-Aliassime.

Auger-Aliassime replied: “Jack, you know that. It doesn’t matter where you looked. You played enough to know where the ball went when you hit it.”

The Canadian then took out his frustration on the referee.

“What you just did is horrible,” he said. “Didn’t you see the ball hit the ground? He hit it with the punch!”

“We’re going to leave here, it’s going to be everywhere and it’s going to look ridiculous.

“I ask you again: If you are 100 percent sure that you are not leaving here and that you do not have the slightest doubt that that was a clean volley winner, then I will shake his hand immediately and the game is over.”

Allensworth replied, “I must say it as I see it, Felix. That is who I am and that is how I saw it.

“If I had any doubts, I would tell you. But we can go back and watch it again after the game. If I realize I’m wrong, I’ll admit it to you. But right now, I can’t go back and watch it again.”

Draper has now reached the quarterfinals, where he will face 15th seed Holger Rune.

Gael Monfils defeated. Carlos Alcaraz (4-6, 7-6, 6-4)

The other big headline of the day in Cincinnati was Frenchman Gael Monfils’ surprise win over world number three and Olympic silver medalist Carlos Alcaraz in the round of 32. The Spaniard lost the second set in a tiebreak and then lost the third and final set, smashing his racket on the court in frustration, which was unusual for him.

Holger Rune defeated Gael Monfils (3-6, 6-3, 6-4)

However, Monfils was unable to carry the momentum of his surprising victory over Alcaraz into the round of 16 and lost to the Dane Rune in three sets after a narrow turnaround.

Ben Shelton defeats Fabian Marozsan (6-4, 6-3)

American Ben Shelton played on home soil ahead of the US Open and made easy work of Hungarian Fabian Marozsan with a straight-set win, securing a place in the quarterfinals.

Andrey Rublev defeats Brandon Nakashima (7-6, 6-1)

Andrey Rublev needed a tiebreaker to win the first set against wildcard Brandon Nakashima before storming the second set to secure his place in the last eight.

Hubert Hurkacz defeats Flavio Cobolli (6-3, 3-6, 6-1)

World number five Hubert Hurkacz needed a decisive third set to defeat Italian Flavio Cobolli in Ohio.

Alexander Zverev defeated. Pablo Carreno Busta (7-5, 7-6)

In the statistics, this match will appear as another straight-set win for world number three Alexander Zverev, but the German had to work hard to prevail in the second-set tiebreak against Spaniard Pablo Carreno Busta.

Frances Tiafoe defeated. Jiri Lehecka (6-4, 6-7, 7-6)

American Frances Tiafoe won a nearly three-hour battle against Jiri Lehecka by a third-set tiebreak after losing the second set in similar fashion. Tiafoe will now face Hurkacz in the quarterfinals.

Jannik Sinner defeats Jordan Thompson without a fight

World number one Jannik Sinner did not have to break a sweat on Friday after his opponent Jordan Thompson withdrew from the round of 16 due to physical problems.