Srisaket Sor Rungvisai knocked out Roman “Chocolatito” Gonzalez in the fourth round with a devastating right hook to retain his WBC super flyweight world title in his second straight win over the former champion. Thailand’s Srisaket knocked Gonzalez down twice in the final round, finishing the challenger off with a right hook with 1:45 to go in the fourth. Gonzalez, of Nicaragua, stayed on the canvas for a couple of minutes. After rising slowly he had to be helped to his corner stool. "This is a chapter of boxing history," Max Kellerman on Sor Rungvisai's KO of Chocolatito. #SuperFly pic.twitter.com/HzTwDrDqk6 — HBOboxing (@HBOboxing) September 10, 2017 <!--//--><![CDATA[// ><!--\n\n\n//--><!]]> The first knockdown came 42 seconds earlier when southpaw Srisaket landed a similar short right hook to the side of the head. Gonzalez was able to get up at the count of seven and continue – but looked out of sorts. The 30-year-old Srisaket went to work quickly in the first round, easily landing combinations and body shots – the fruits of months of intense training in the gym for the most important fight of his career. “I trained really hard for four months because I wanted everyone to know what I came here for,” said Srisaket of the brutal beat down. “I have shown that I am the best 115 pound fighter in the world.” The Thai dynamo silenced critics who had claimed his majority decision win in the first fight six months ago in New York was a fluke and the result of accidental head butts. Both fighters came out swinging from the opening bell in Sunday morning’s (Hong Kong time) 115-pound rematch at the outdoor StubHub Centre stadium, as it became apparent in the early rounds that Srisaket was in charge and the fight likely would not go the distance. “For the first fight I only trained two months. This fight I knew I was going to knock him out,” Srisaket said. “I am not scared of anyone.” Srisaket (44-4-1, 40 KOs) said he wanted to make his country proud. “I fought for Thailand, for the pride of Thailand,” he said. Gonzalez, who dropped to 46-2 overall, was taken to the hospital immediately after the fight for medical treatment. He was trying to avenge the only loss of his career against Srisaket but he failed to put up any defence against the onslaught of the Thai’s superior punches. The former pound-for-pound division king has had several gruelling fights in recent years, which have taken a heavy toll on his 30-year-old body. On the undercard, Japan’s Naoya Inoue won his US debut by defending his 115 pound WBO title with a sixth-round knockout of Antonio Nieves.