South Africa's Issac Hlatshwayo and Dominican Delvin Rodriguez will fight a rematch for the vacant International Boxing Federation welterweight crown on August 1, promoters announced on Monday.

Hlatshwayo, 28-1-1 with 10 knockouts, fought to a draw with Rodriguez, 24-2-2 with 14 knockouts, last November in South Africa. The championship rematch will be staged at a casino in Uncasville, Connecticut.

"I am going to knock him out this time around so the scorecards won't matter," Rodriguez said. "I have a bad taste left in my mouth from November 17. I plan on getting rid of it in spectacular fashion."

The title went up for grabs when Ghana's Joshua Clottey was stripped of the title in April for refusing to fight mandatory challenger Hlatshwayo.

Clottey instead took a big-money deal with Puerto Rico's Miguel Cotto, who beat him last month in a 12-round split decision.

The welterweight realm features such stars as Manny Pacquiao, Shane Mosley, Floyd Mayweather Jnr and Cotto but most are not the recognized champions in the division, fighters preferring big-money deals to mandatory foes of governing bodies.

Rodriguez was upset after the first fight, feeling he should have got the decision that instead saw one judge favour each fighter and the third score the bout a draw.

"Of course I was not happy after the first fight. I know I won the fight," Rodriguez said. "I went into his backyard and fought him and then we set the rematch to be over here in the States and he wouldn't come."

That prompted Rodriguez to fight American Shamone Alvarez last March. Rodriguez won a 12-round decision and ensured he would be in the title picture when Clottey vacated the throne.

"I know that I can take his best punches and that he cannot take mine. I'm going to go right at him from the opening bell until I knock him out," said Rodriguez.

"The only way he can win the title is by going through me and I promise you that there is no way that is going to happen."