The world heptathlon champion Jessica Ennis will compete in five events at the UK Trials and Championships later this month as she steps up preparations for the defence of her title.
The 25-year-old has entered the high jump, long jump, 100 metres hurdles, shot put and javelin at the world trials, which take place at Birmingham's Alexander Stadium from 29 to 31 July.
Ennis won the high jump and hurdles two years ago but faces a battle in the latter this time against the new British record holder, Tiffany Ofili-Porter, while she will go head to head with Shara Proctor in the long jump.
The trials come four weeks before the World Championships in Daegu, South Korea, where the Sheffield athlete will aim to retain the title she won for the first time in Berlin in 2009.
Ennis said: "It's great to be competing in a spread of events in Birmingham and it's important that I can continue to compete in this way as we head towards the upcoming major championships.
"I'm feeling really happy and confident in myself. I feel fit and healthy and that's really key at this time of year.
"The World Championships are really important. I think a lot of the public are thinking only of 2012 at this stage, but this comes first for us athletes and it's really important that we take it one meet at a time."