Three-time world 200m champion Allyson Felix of the United States takes part in a photoshoot ahead of this weekend's London Grand Prix and tells BBC Sport's Nick Hope about her plans for the season.

Diamond League - London Grand Prix
Venue: Crystal Palace Dates: 13-14 August
Coverage: Watch Live on BBC 2 (Friday 1800-2100 BST) and BBC 1 (Saturday 1300-1630 BST) and BBC Sport website (UK users only); coverage on BBC Radio 5 live, BBC Red Button and BBC Sport website Full details