Alex de Minaur can't forget this US Open beating fast enough after being sent packing from Flushing Meadows in a third-round shocker.
The Australian No.1 was unable to explain how he was blown off the court in the first two sets of a 6-1 6-1 3-6 7-6 (7-5) loss to in-form Spaniard Pablo Carreno Busta.
"Look, more than anything I'm just disappointed with my level," de Minaur told AAP.
"Happy and extremely proud of the fight that I showed considering my level today.
"At times, I found it very hard to make the court at all.
"But I could have easily been into a fifth set right now just due to fighting and my attitude."
De Minaur indeed threatened a famous fightback after winning the third set and taking the fourth to a tiebreaker.
Carreno Busta, the 12th seed, a two-time US Open semi-finalist and recent winner of the Montreal Masters, gave him hope after taking a medical time-out before the fourth set to have treatment for an apparent adductor or back issue.
The stoppage and gear change initially appeared to do the trick, with Carreno Busta holding serve to love immediately upon the resumption.
De Minaur's confidence grew, though, and the match seemed headed towards a deciding fifth set before the Spaniard won a remarkable match point.
After being lobbed, Carreno Busta didn't look a hope of reaching the ball but somehow managed to play a tweener over de Minaur's head.
De Minaur could only manage to get a frame to the ball before throwing his racquet down in anguish at losing the match.
De Minaur's best grand slam results have consistently come in New York, with the world No.20 reaching the quarter-finals in 2020, the last the year before and the third round on two other occasions.
But Carreno Busta ultimately had too much firepower on Friday.
The big-hitting Spaniard bludgeoned 36 winners, broke de Minaur five times and dropped serve only once to progress to the fourth round in three hours and 33 minutes.
"Look, honestly, I didn't even give him a chance to miss. That's where I see it," a disgusted de Minaur added.
"I was finding it hard to make a ball in the court and that's something that I can't give a reason for. It was just one of those days.
"I'll just try to put this behind me as quickly as I can and be ready for the next events."