The Next Stars program of the National Basketball League has groomed the likes of LaMelo Ball and Josh Giddey and has now added young European players to its ranks for the first time.

Four of this season's seven Next Stars are from Europe, as is French prospect Hugo Besson, a combo guard who joined the New Zealand Breakers as a regular import player because the NBL team already had its assigned Next Star in compatriot Ousmane Dieng.

"We've been turning people away in droves, it's the honest truth," NBL commissioner Jeremy Loeliger told The Associated Press in an interview ahead of the season, which opens Friday.

"We're very selective."

Players see the Next Stars' track record, the opportunity to improve their English if needed, and the league's improving quality and up-tempo style that has also attracted high-profile investors like NBA veteran John Wall.

German center Ariel Hukporti (Melbourne United), Russian shooter Nikita Mikhailovskii (Tasmania JackJumpers), French forward Tom Digbeu (Brisbane Bullets), Australian center Makur Maker (Sydney Kings) and Besson had all declared for the 2021 NBA draft but withdrew in hopes of improving their chances for 2022.

The 18-year-old Dieng, a 2.03m guard-forward, will be draft eligible in 2022. He was the first European to sign as a Next Star after turning down American colleges and the NBA's G League Ignite program.

"It's seen as a bona fide way to enter the NBA draft in an alternative pathway to college," Loeliger said.

Next Stars are paid by the league - around $US100,000 ($A140,000) on average - and assigned to a team with the dual goal of helping their squads while improving their draft stock. The league benefits from international exposure and potential NBA buyouts of contracts.

The Next Stars program, entering its fourth year, until now had featured local players or Americans.

Ball played for the Illawarra Hawks before being drafted third overall by the Charlotte Hornets in 2020. Giddey was selected sixth overall by the Oklahoma City Thunder in July.

The NBL, colleges and the Ignite program often compete for the same players. Highly touted 18-year-old Australian guard Dyson Daniels chose the Ignite over Next Stars.

Dieng, like Daniels, is widely projected as a first-round pick while most of the other Next Stars, including New Zealand-born Mojave King (Adelaide 36ers), slot lower in mock drafts.

A lot can change, of course. Orlando Magic guard R.J. Hampton's draft stock dropped during his short stay with the Breakers two seasons ago, when he struggled with injuries and limited minutes.

The young prospects have to fight for playing time on rosters that include seasoned veterans and former NBA players.

"There's a risk in everything. The flip side of the coin with risk is opportunity," Loeliger said, citing Ball's increased responsibility after a season-ending injury to the team's shooting guard.

"All of a sudden LaMelo Ball became the principal ball-handler and scorer for the Illawarra Hawks that season and that really allowed him to do the things that he went on to do," he said.

Illawarra's Justinian Jessup is the only Next Star projected as an early season starter. The American is a "draft-and-stash" player in his second season after being selected by the Golden State Warriors in the 2020 draft.

The 20-year-old Besson is expected to start for the Breakers - the only foreign club in the 10-team NBL - and had a strong pre-season punctuated by an explosive dunk over former Houston Rockets center Zhou Qi. The Breakers have set up shop in Melbourne because of travel restrictions and had a COVID-19 scare ahead of their opener on Saturday.

Besson told club media that he chose the NBL because "it's fast, it's shooting fast, it looks a lot like the NBA."

Other players have eyes on the NBA, as well. Adelaide signed 2.21m center Kai Sotto, whose every move is closely tracked back home in the hoops-mad Philippines. Aussie guard-forward Luke Travers of the Perth Wildcats was upset over being left off mock draft boards.

The NBL has a broadcasting deal in the Philippines and with two Chinese centers - 2.26m Chuanxing Liu signed with Brisbane - its social media metrics have "gone through the roof" in China, Loeliger said.

The privately owned league doesn't release revenue figures but its capital growth has attracted 15 former or current NBA players to take ownership stakes since businessman Larry Kestelman bought the league in 2015.

The league has talked to "some really, really prominent NBA players" about investing, Loeliger said.

"I can assure you," he said, "that we'll be continuing to have a number of those conversations in the coming 12 months."

Australian Associated Press