Alistair Brownlee tells BBC Sport's Graham Bell he has a real chance of winning triathlon's World Championship Series if he does well in this weekend's London leg in Hyde Park.

Brownlee, who has won all three WCS races he has entered so far this year, trains around his Leeds home, along with his younger brother Jonathan, another top triathlete.

Watch Brownlee in action at the London World Championship Series triathlon on Saturday 15 August from 1300-1630 on BBC One and the BBC Sport website (UK users only).