Legendary former four-division champion Nonito Donaire, 42, is braced for one final title run, facing Chile's Andres Campos for the interim WBA bantamweight strap this month.

Donaire (42-8, 28 KOs) will return one month shy of a two-year layoff and after consecutive defeats for the first time in his illustrious career, having caught the itch to box again after watching former foe Naoya Inoue's dramatic stoppage win over Ramon Cardenas on May 4.

BoxingScene first reported the fight booking, taking place on June 14 as part of the WBA's annual KO to Drugs festival at Casino Buenos Aires in Buenos Aires, Argentina.

It'll be the second of two shows they promote in the country's capital that weekend, with a June 13 bill TBA.

On a weekend where Manny Pacquiao was in Las Vegas completing media obligations as part of the preparations for a surprise WBC welterweight title shot against Mario Barrios, his compatriot will fancy his chances against Campos - who is moving up in weight again.

A Hall of Fame lock when he does eventually pull the curtain on his career, Donaire also will be in attendance at the IBHOF's annual Induction Weekend as a celebrity guest.

Campos (17-2-1, 6 KOs) has experienced mixed success since losing a 12-round unanimous decision to then-unbeaten Sunny Edwards for the Brit's IBF flyweight title in June 2023. The 28-year-old is 2-1-1 with a pair of knockout victories since then, though campaigned at junior bantamweight for his last two appearances and will go up another four pounds here.

Joselito Velazquez became the first to stop him by scoring a sixth-round stoppage win Oct. 4 in Cancun, Mexico, before the Chilean fared better among home comforts with a third-round finish of 20-fight pro Jimson Garcia on April 12.

Alexandro Santiago outpointed Donaire over 12 rounds (116-112, 116-112, 115-113) in their vacant WBC bantamweight title fight on the Terence Crawford vs. Errol Spence Jr undercard inJuly 2023, 13 months after Inoue dismantled him during their three-belt unification rematch at 118lbs.

Inoue has boxed seven times since then, completing undisputed championship status at bantamweight and later junior featherweight, as the Japanese star continues to flourish with more big challenges beckoning, starting with Murodjon Akhmadaliev on Sept. 14.

Meanwhile Donaire's lengthy absence was not all his own doing, with a targeted showdown against fellow legendary former champion Roman "Chocolatito" Gonzalez previously mooted for the WBA's interim belt.

Nicaragua's Gonzalez (52-4, 42 KOs), five years his junior, ended a 19-month layoff by stopping Colombia's Rober Barrera in the final stanza of their 10-round contest in July. Talks were ongoing, though the fight never materialised and Donaire entertained other options.

Seiya Tsutsumi (12-0-3, 8 KOs) being downgraded from full champion to "champion in recess" last month set the wheels in motion for Donaire to be presented with a secondary title bout, though Antonio Vargas (19-1, 11 KOs) was elevated after winning the interim crown on Dec. 13 against then-unbeaten contender Winston Guerrero in Florida.

He has already stated his desire for big fights — Donaire even at this stage would enhance his resume — while a unification with WBC titleholder Junto Nakatani is of interest. The 27-year-old southpaw faces Ryosuke Nishida on June 8 in a WBC/IBF unification between unbeaten champions, ranked No. 1 and No. 2 by the The Ring at bantamweight.

Donaire has twice set the record as the oldest fighter to win a bantamweight title —

November 2018 and May 2021.