Amir Khan admits he will have to spend more time with his trainer Virgil Hunter in San Francisco after being floored on his way to a 12-round points win over Julio Diaz. The Briton quickly bounced up off the canvas in the fourth round but after a count there were more worrying moments before he looked on the verge of being stopped in the 11th round. However, the former light-welterweight world champion prevailed and won a unanimous -- but narrow -- points decision by scores of 114-113, 115-113 and 115-112 in an enthralling encounter at the Sheffield Arena on Saturday.

Amir Khan has not been dissuaded from thinking big by two defeats in his last three fights and claims victory on Saturday will give him the opportunity to become undisputed world light-welterweight champion later this year. The 26-year-old must first come through a catchweight (143 pounds) 12-round non-title contest with Mexican Julio Diaz at the Motorpoint Arena in his home city of heffield, northern England, in his first fight back in Britain for two years.

Philippine boxing hero Manny Pacquiao will likely face either of US fighters Brandon Rios or Mike Alvarado in Macau in November, his promoter Bob Arum said Thursday. Pacquiao, 34, who has won an unprecedented eight world titles in different weight divisions, had wanted to fight either Mexican Juan Manuel Marquez and unbeaten US boxer Timothy Bradley, who both beat him last year. But they decided decided to fight each other in Las Vegas in September.

Unbeaten American boxing star Floyd Mayweather says neither jail time nor ring rust from a one-year layoff will diminish him next week when he returns against compatriot Robert Guerrero. "Of course I feel unbeatable. I'm in the sport where I'm the best," Mayweather said in a Wednesday teleconference call. "I'm not going into the fight thinking I'm beatable."