LAS VEGAS -- In 2010, Wilfredo Vazquez Jr. of Puerto Rico knocked out Marvin Sonsona of the Philippines in the fourth round to win a vacant junior featherweight world title. Four years later, they will meet again.

Before the Manny Pacquiao-Timothy Bradley II final news conference at the MGM Grand on Wednesday, promoter Sampson Lewkowicz, who promotes Sonsona, told ESPN.com that the rematch was made and would be one of HBO PPV-televised bouts on the undercard of middleweight champion Sergio Martinez’s defense against Miguel Cotto on June 7 at the Madison Square Garden in New York.

Lewkowicz, Martinez’s longtime adviser, Martinez promoter Lou DiBella, Top Rank and Cotto Promotions are trying to put together the rest of the undercard, which has been difficult given all of the parties that need to be satisfied.

Sonsona (18-1-1, 15 KOs), a former junior bantamweight titleholder, has not lost since the Vazquez fight, although he has only fought four times, most recently a very impressive third-round destruction of former junior featherweight titlist Akifumi Shimoda in February in Macau.

Vazquez (23-3-1, 19 KOs), who recently signed with Cotto Promotions, is just 3-3 in his last six fights, losing his title by 12th-round knockout in an upset to Jorge Arce in 2011 to begin the slide. But he is coming off a 12-round decision win against previously unbeaten Guillermo Avila in September.