Jamaican Asafa Powell admits to injury frustration

A frustrated Asafa Powell says his recent groin injury prevented him from making his athletics "break through" at the recent World Athletics Championships.

The Jamaican sprinter, who was forced to pull out of the event in Daegu, South Korea, returns to action at the Diamond League in Zurich, Switzerland, and insists he will use the meeting to prove a point to himself and not the critics.

Watch live coverage of Diamond League in Zurich on Thursday 8 September on BBC Two and the BBC Sport website from 1900 BST.