Evan Fournier is understandably upset. Leon Rose is understandably patient.

Neither is wrong. Sometime soon, however, the Knicks have to move the unhappy French marksman.

The 30-year-old Fournier went scorched earth recently, blasting the way the Knicks handled him this past season in an interview with French outlet L’Equipe.

Fournier, on an expiring $18.9 million contract, has been the subject of trade rumors. But as August nears, he’s still a Knick after spending almost all of last season as an expensive cheerleader.

Fournier began the season as the starter, but was moved to the bench in mid-November and never really worked his way back into the rotation.

He appeared in just 27 games, and didn’t play a second in the postseason.

“When he took me out of the [starting] five, he just told me he was going to try something else,” Fournier said, referring to coach Tom Thibodeau. “Then at the first game of a road trip, he announced to me that I was leaving the rotation, and ciao.

“At first, yes, you want to spit on everyone. You have hatred. Derrick Rose and I looked at each other and said to each other: ‘What the hell are we doing here?’ During the five-on-five, we were on the side. Uncool times.”

He added: “If I stayed, it would be a disaster basketball-wise for my career.”

It makes sense that Rose isn’t in a rush to move Fournier because his expiring contract could be a valuable part of a trade package for a significant player.

The Knicks have a glut of guards and small wings after signing Donte DiVincenzo to a four-year, $50 million deal and trading Obi Toppin to the Pacers.

They are in need of a big wing, and have reportedly been active looking to create more balance to the roster.

But the trade market has been slow as teams wait to see what happens with on-the-block stars James Harden of the 76ers and Damian Lillard of the Trail Blazers.

Then again, keeping a disgruntled player seems like bad business.

Time is ticking on Leon Rose and the Knicks to find Fournier a new home.

The latest example of the significant forward strides the Knicks have made will come in roughly five weeks.

No, we’re not predicting a major trade.

It’s the FIBA World Cup.

The Knicks will be well represented at the tournament that runs from Aug. 25-Sept 10 in the Philippines, Indonesia and Japan: Jalen Brunson and Josh Hart are playing for Team USA and RJ Barrett will be on Team Canada.

That’s three of the Knicks’ best players being showcased on an international stage, which feels significant. The Knicks are coming off their best season in a decade, winning a playoff round for the first time since 2013, and their best players are being recognized.

There are, of course, positives and negatives to this.

The Knicks did play into the middle of May, creating less time to rest for the ensuing season.

Any time spent playing in competitive environments brings further risk of injuries, as Mets fans will remind you after losing Edwin Diaz during the World Baseball Classic to a major knee injury.

But, unlike the timing of Diaz’s injury, the FIBA event won’t be played on the doorstep of the season. It’s not interfering with training camp.

On the plus side, added luster is never a bad thing for a team that deserves it.

So while you may hold your breath that Barrett, Brunson and Hart avoid injury — rest assured Thibodeau will be doing the same — it will be fun to see all three playing in front of the world, particularly if the U.S. and Canada clash in the medal round. Bragging rights will be at stake, along with the Naismith Trophy.

It’s a potentially fascinating matchup on a number of levels: Brunson against rising Thunder star Shai Gilgeous-Alexander, Hart and former Villanova teammate Mikal Bridges of the Nets going up against Barrett and Nuggets star guard Jamal Murray.

Amid what has been a quiet summer, the tournament offers a little something to get excited about.

The biggest Knicks positive about summer league had nothing to do with anything that took place on the court.

There was no hype or buzz about the makeshift group of undrafted free agents and journeymen that went to Las Vegas, and that was a good thing.

It was evidence of how far the Knicks have come in recent years.

Now, part of that had to do with them selecting just one player — 2022 second-rounder Trevor Keels — in the past two drafts.

It was also a sign of a contender that doesn’t have room on the roster; it has developed players who don’t belong in summer league anymore.

The Knicks’ summer league teams used to be interesting because they so frequently featured top draft picks. That hasn’t been the case lately. Their last top-10 pick was Toppin (No. 8 overall) in 2020.