World heptathlon champion Jessica Ennis has revealed she will not be competing for Britain at this year's Commonwealth Games.

Ennis, who was crowned world champion in Berlin in August 2009, claims that competing in Delhi in October will harm her chances of winning the following year's European Championships.

"I sat down with my coach and we decided the Commonwealth Games isn't a good option this year," the Sheffield-born athlete told BBC Sport.

"October is a difficult time to peak - in July for the Europeans and then again in October - and October is when I begin my winter training, so we sat down and decided the main focus is the Europeans this year."