Jessica Ennis-Hill hits her stride as preparations for Rio gather pace

• Olympic champion claims personal best at IAAF event in Germany
• Denise Lewis: ‘She is definitely the favourite for Rio’Jessica Ennis-Hill believes she is fitter now than at any time since winning heptathlon gold at London 2012 and she showed her Olympic defence is on track by scoring an impressive 6,733 points to win the IAAF Combined Events Challenge in Ratingen, Germany.Not only was the tally 64 points higher than her score of 6,669 to win the world championships in Be