Canelo Alvarez admits the risk of fighting Callum Smith but relishes challenge

Canelo Alvarez says he is taking a risk against an unbeaten 30-year-old fighter from Liverpool, Callum Smith, who is regarded as the world's best fighter at 168lbs after winning the World Boxing Super Series.

Canelo, a four-division world champion who, for many, is the best pound-for-pound boxer around, has only suffered a solitary defeat to Floyd Mayweather in 2013.

Canelo has acknowledged the threat posed by Smith, who will have a significant size advantage, but says he likes "the risk of it" and likes "challenges to continue making history." The Mexican star battles Britain's WBA 'super' champion, with the WBC title also at stake in San Antonio on Saturday.