Kiwi heavyweight Mark Hunt has looked fit and dangerous in his last two UFC fights, resulting in first round knockouts.

New Zealand UFC star Mark Hunt has called out resurgent Brazilian Junior dos Santos for a rematch.

Former heavyweight champion Dos Santos revived his career by dominating the well-respected Ben Rothwell in the main event of UFC Fight Night 86 in Zagreb, Croatia last weekend, winning by a unanimous points decision.

It was dos Santos' second win in three fights over the last 18 months. It kept him at No 5 in the rankings and on the lookout for a suitable opponent to manoeuvre him further up the list.

It didn't take long for the eighth-ranked Hunt to put his hand up with the Sydney-based Kiwi Samoan taking to Twitter to urge UFC boss Dana White to engineer the matchup.

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Hunt is on a two-fight streak after demolishing Brazil's Antonio "Bigfoot" Silva and American Frank Mir with devastating first round knockouts.

He has always relished rematches and is eager to square the ledger against dos Santos who beat Hunt in their Las Vegas showdown in late 2013, winning with a brutal third round KO.

Hunt, who arrived late in the United States because of visa hassles, used his fists to promising effect early in the fight.

But dos Santos finished it off with a "highlight reel knockout", catching Hunt square on the top of the head with a spinning heel kick that sent him to the canvas and then jumping on top of the flattened Hunt and knocking him out with a right hand.

Meanwhile, it has emerged that Mir, Hunt's last victim, has been informed by the United States Anti-Doping Agency of a violation from the fight against Hunt in Brisbane last month.

Mir has maintained his innocence and demanded a B sample test, worried that at the age of 37 a potential two-year ban would end his time in the sport.

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