Business is booming.

US Open dark horses to watch out for at Flushing Meadows

Rafael Nadal, Serena Williams, Nick Kyrgios, Emma Raducanu… and Novak Djokovic? Let’s not go there.

Many familiar faces will take center stage on Flushing Meadows, but who are some of the more unheralded stars ready to break out before our very eyes?

They could provide an early surprise, while a select few have the potential to compete all the way to the women’s and men’s finals on September 10 and 11, respectively.

As the US Open gets closer and closer, Dailymail.com takes a closer look at who to watch out for for this tournament…

Two of the Open Era's holy trinity will be at Flushing Meadows on Monday, August 29th

Two of the Open Era’s holy trinity will be at Flushing Meadows on Monday, August 29th

Botic of the Zandschlup (World No. 23)

The Dutchman gets in shape at the right time and rises this week to his highest ranking of 23.

Flushing Meadows should have fond memories of Van de Zandschlup after he really announced himself at the tournament last year, becoming the first open era qualifier to reach a quarter-final from a qualifying spot.

Van de Zandschlup lost to Nadal in straight sets at Wimbledon, but has the ability to harass the best in the world. He showed promising signs in a 6-4, 7-5 defeat to Daniil Medvedev at the Cincinnati Open in mid-August.

Botic van de Zandschlup reached the quarterfinals of the US Open in 2021 from a qualifying place

Botic van de Zandschlup reached the quarterfinals of the US Open in 2021 from a qualifying place

Botic van de Zandschlup reached the quarterfinals of the US Open in 2021 from a qualifying place

Beatriz Haddad Maia (World No. 15)

Brazil’s best-seeded tennis player was bounced in straight sets at the Cincinnati Masters earlier this week by 25-year-old Latvian number 16, Jelena Ostapenko.

While the 6-4, 6-4 defeat isn’t ideal, Haddad-Maia is an emerging force in the women’s game.

The Brazilian has never made it past the second round in a major, but given recent form, she has the resources to advance several stages.

Haddad Maia’s recent three-set defeat to Simona Halep in the final of the National Bank Open in Toronto showed her ability to combine it with top-level talent.

Beatriz Haddad Maia's recent form should give her hopes for a best-ever Grand Slam finish

Beatriz Haddad Maia's recent form should give her hopes for a best-ever Grand Slam finish

Beatriz Haddad Maia’s recent form should give her hopes for a best-ever Grand Slam finish

Borna Coric (world no. 29)

The Croatian sensation is in the mold of his life after dismantling some of the world’s best to take out the Cincinnati Masters.

Coric beat the world No. 5, Stefanos Tsitsipas, 7-6, 6-2 in the final after an amazing week beating Rafael Nadal, Felix Auger-Aliassime, Cameron Norrie, all of whom are in the top 10.

Incredibly, the Zagreb native has moved up 123 places — yes, you read that right — after the win in Cincinnati. Coric entered the tournament and was in 152nd place.

After dropping just one set during the Masters — against Nadal — Coric will pose a huge threat to those vying for the title.

Borna Coric has skyrocketed in the rankings and is back in full shape after shoulder surgery

Borna Coric has skyrocketed in the rankings and is back in full shape after shoulder surgery

Borna Coric has skyrocketed in the rankings and is back in full shape after shoulder surgery

Caroline Garcia (World No. 17)

There is probably no woman with a bigger shape than the French Caroline Garcia.

The 28-year-old won the Cincinnati Masters over two-time Wimbledon champion Petra Kvitova in straight sets, 6-2, 6-4.

Going into the finals this year, Garcia had more wins than any other woman on the WTA circuit.

The Frenchwoman made history in the Midwest, becoming the first ever qualifier to win the tournament.

Despite losing in the first round of the National Bank Open in Toronto, Garcia’s form line is promising, having toppled world No. 1 Iga Swiatek in her hometown of Poland Open in July on her way to glory.

Caroline Garcia storms again at her best after previously ranked in the top five in the world

Caroline Garcia storms again at her best after previously ranked in the top five in the world

Caroline Garcia storms again at her best after previously ranked in the top five in the world

Holger Rune (world no. 32)

The Danish prodigy has raised eyebrows throughout the tour, both for his spectacular playing and his unbridled, how to say, enthusiasm.

Rune’s recent form has been somewhat inconsistent, unable to beat the likes of Cameron Norrie, Pablo Carreno Busta and American JJ Wolf in recent weeks.

However, the 19-year-old knocked over former world number 9 Fabio Fognini in the Canadian Open.

Rune reached the quarterfinals of the French Open where he was told to ‘grow up’ and ‘show some respect’ in a tense battle by Casper Ruud.

En route to the last eight, Rune defeated world number 5 Tsitsipas and 14th seed Denis Shapovalov.

Denmark’s hot-headed star also sent world No. 2 from Germany, Alexander Zverev, in April, so he’s definitely one to watch.

Holger Rune has shown to be a passionate, albeit controversial figure on the pitch

Holger Rune has shown to be a passionate, albeit controversial figure on the pitch

Holger Rune has shown to be a passionate, albeit controversial figure on the pitch

Sorana Cirstea (World No. 38)

Although the right-handed Romanian has not yet won a singles title in her professional career, she does have Grand Slam form on the hard courts.

Cirtea made the last 16 in Melbourne at this year’s Australian Open before falling in three sets to Iga Swiatek.

Impressively, the 32-year-old defeated Swiss No. 13 Belinda Bencic just over a week ago, 6-2, 6-7, 6-4 in Cincinnati.

Don’t expect Cirtea to go all out, but she could cause a bloodbath in the draw with her powerful, flat groundstroke play.

Sorana Cirstea showed herself on the hard courts in Melbourne during her last slam appearance

Sorana Cirstea showed herself on the hard courts in Melbourne during her last slam appearance

Sorana Cirstea showed herself on the hard courts in Melbourne during her last slam appearance

Lorenzo Musetti (world no. 30)

Last year, the Italian became the youngest player ever to break into the top 100 in the world.

Since then, he took his first ATP title — the Rotterdam Open — beating Polish Hubert Hurkacz, Canadian Auger-Aliassime and Bulgarian Grigor Dimitrov, among others.

Musetti famously pushed Novak Djokovic to five sets at at least the year’s French Open, showing how good he can be.

The 20-year-old may have just lost to Richard Gasquet at the Winston-Salem Open, but Musetti has shown what a talent he is before.

The Italian has the qualities to harass some of the world's best if he can pull it all together

The Italian has the qualities to harass some of the world's best if he can pull it all together

The Italian has the qualities to harass some of the world’s best if he can pull it all together

Ajla Tomljanovic (World No. 48)

The Australian-Croatian defeated world number 4 Paula Badosa in Cincinnati to move up 15 places in the world rankings.

While bundled up in the Midwest and Toronto, the losses came at the hands of Kvitova and Swiatek, respectively.

There may be no such thing as admirable defeats, but there is certainly no shame in Tomljanovic’s performances at the set-up events.

The 29-year-old has never won a professional singles title and is not expected to be at Flushing Meadows.

Although she has defeated the likes of Gabrine Muguruza, Emma Raducanu, Belinda Bencic and most recently Badosa.

Combine this with making it to a quarter-final at Wimbledon, there’s a chance Tomljanovic could at least make his way into the second week.

The Australian-Croatian shocked Spain's Paula Badosa in the Cincinnati Masters round of 32

The Australian-Croatian shocked Spain's Paula Badosa in the Cincinnati Masters round of 32

The Australian-Croatian shocked Spain’s Paula Badosa in the Cincinnati Masters round of 32

.