Heptathlon champion Jessica Ennis says overjoyed at gold

London, Aug 9 (ANI): Olympic heptathlon champion Jessica Ennis has said that her victory at the all-round athletics event was the greatest achievement of her career. Ennis was a favourite of the 80,000 strong crowd at the Olympic stadium in the first few days of track and field when she surpassed all expectations with a solid performance to gain her first Olympic title to go alongside her 2009 world title. Ennis says the exposure sport gets during the Olympics helps attract and develop young talent and ultimately brings in more medalists for the country in the long term.