The final event of Day One. Jessica is one of the quickest 200m heptathletes, but how quick in Rio depended on many factors. Find out how she got on here.
Running 23.49 seconds in the 200m leaves her in 1st place after Day One.
Tomorrow is Day Two of the Heptathlon – coverage begins on BBC One at 15:45 UK time, live from Rio, Brazil. First up is the Long Jump.
VIDEO Watch our video from way back in 2009. Jessica bounces back into training… and achieves much much more!