Result: Shawn Porter to face Kell Brook after Paulie Malignaggi stoppage

US boxer Shawn Porter speaks during a press conference in Washington on April 17, 2014
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IBF welterweight champion Shawn Porter knocks out Paulie Malignaggi to set up a summer showdown with unbeaten Brit Kell Brook.

Shawn Porter has successfully defended his IBF welterweight title with a fourth-round stoppage of Paulie Malignaggi.

The unbeaten American caused a surprise in December when he captured the world title off Devon Alexander, but the 26-year-old proved that the victory was no fluke by quickly dismantling Malignaggi in Washington.

The opening round was even, but at the start of the second, Porter took control with a series of hard-hitting punches that left Malignaggi struggling to make the bell.

The third was a repeat of the previous round, and in the following stanza, Porter dropped Malignaggi with a right hand, and although the Brooklyn fighter beat the count, he was soon on the canvas for a second, and final, time after being battered into submission by the champion.

Porter will now face British welterweight Kell Brook in a bout which is likely to take place in the United States in July.

Adrien Broner swings on Paulie Malignaggi during their WBA Welterweight Title bout at Barclays Center on June 22, 2013
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