The date and venue for George Kambosos Jr.’s first defenses of his lightweight titles reportedly are set.

According to a report posted Tuesday afternoon on ESPN.com, Kambosos will defend his IBF, WBA, WBC “franchise” and WBO 135-pound championships on June 5 at Marvel Stadium in Melbourne, which can accommodate approximately 55,000 for boxing. Kambosos’ next fight thus would take place the night of June 4 in the United States.

Lou DiBella, Kambosos’ promoter, declined comment Tuesday when reached by BoxingScene.com in reference to the date and site of Kambosos’ next fight. DiBella is still negotiating to secure Kambosos’ opponent, though talks with Bob Arum’s Top Rank Inc. about a Kambosos-Vasiliy Lomachenko fight have advanced much more productively than discussions regarding a Kambosos-Devin Haney bout with Eddie Hearn, whose company promotes Haney.

DiBella informed BoxingScene.com for a story posted Saturday that Team Kambosos has “moved on” from possibly boxing Haney next because the counteroffer from Hearn to DiBella’s initial proposal was “preposterous,” among other adjectives.

ESPN.com’s Mike Coppinger was the first to report Tuesday on Twitter the date and site for Kambosos’ return to the ring.

Kambosos, 28, was born and raised in Sydney, but Melbourne, Australia’s second-most populous city, has a large concentration of Greeks. Kambosos is of Greek descent, which would make Melbourne an attractive site for his next fight.

Kambosos (20-0, 10 KOs) upset Teofimo Lopez (16-1, 12 KOs) by split decision in their 12-round title fight November 27 at Madison Square Garden’s Hulu Theater in New York.

His triumphant return to the ring in his home country could’ve come against a lesser opponent, but the ambitious Kambosos insisted on facing such formidable foes as Lomachenko (16-2, 11 KOs), Haney (26-0, 15 KOs) or Ryan Garcia. Las Vegas’ Haney holds the WBC world lightweight title, the only belt Kambosos needs to become boxing’s undisputed lightweight champion.

Lomachenko, however, is a more proven attraction than Haney in terms of viewership on TV or a streaming service and at the gate. The 33-year-old Lomachenko is a three-division champion who was considered one of the top three boxers, pound-for-pound, in the sport before Lopez upset him by unanimous decision to win the four titles Kambosos now owns in October 2020 at MGM Grand Conference Center in Las Vegas.

There were preliminary discussions related to Kambosos facing Garcia (21-0, 18 KOs) in his next fight if Garcia, of Victorville, California, beats Ghana’s Emmanuel Tagoe (32-1, 15 KOs) on April 9 at Alamodome in San Antonio.

The turnaround would’ve been quite quick for Garcia to fight Kambosos on June 5, though, just eight weeks after he’ll battle Tagoe. There also were concerns about building such a significant economic event around Kambosos-Garcia because Garcia, while heavily favored to beat Tagoe, could get cut or injured in what will be his first fight in 15 months.

If Kambosos boxes Lomachenko, ESPN, ESPN Deportes and ESPN+ would be the primary television and streaming outlets for their fight in the United States. In the less likely event Kambosos battles Haney, DAZN would stream the card worldwide, though the pay-per-view distributor in Australia would depend on whether Kambosos boxes Lomachenko or Haney.

Keith Idec is a senior writer/columnist for BoxingScene.com. He can be reached on Twitter @Idecboxing.