25 July 2011 Last updated at 16:32 GMT

Amir Khan's dad reveals anxiety in watching son box

Britain's Amir Khan knocked out Zab Judah in five rounds in their light-welterweight unification fight in Las Vegas.

The end came when Khan landed with a crunching right hand to the body with Judah unable to make the count.

Radio 5 live Weekend Breakfast's Phil Williams spoke to Amir Khan's dad Shah. He gave his reaction to the fight and said he would never get used to seeing his son being punched.

For more Radio 5 live interviews, please visit the Best Bits page.