Repeat of 2012 medal would be "incredible" says Ennis-Hill

Jessica Ennis-Hill admits it would be "incredible" to be part of a repeat of'Super Saturday' at the Rio Olympics.

The 30-year-old will begin the defence of her heptathlon crown at the Olympic Stadium on Friday, with the culmination of the seven-event competition coming the following day, when Mo Farah and Greg Rutherford will also go for gold in the 10,000 metres and long jump respectively.

Four years ago in London the trio gave British athletics its finest hour, allthree celebrating victory on home soil, to the delight of a frenzied crowd,within the space of a barely-believable 45 minutes.

The timetable this time means the medals cannot be won in quite such a short space of time, but there remains a strong chance of another momentous day.

"It is really exciting. I am happy the timetable has fallen like that," saidEnnis-Hill.

"It's a really nice moment to be in the stadium again, knowing what we allachieved four years ago.

"It would be incredible to achieve it again, but I'm not sure if that'spossible or not.

"I'm not going to be too greedy and imagine it will happen again, but it wasreally special to be part of that."

Of the trio Ennis-Hill has certainly experienced the toughest route to Rio,looking to retain her crown just two years after the birth of her son Reggie.

Should she be successful, she would become only the third athlete - afterAustralian sprint hurdler Shirley Strickland in 1956 and Cameroon triple-jumper Francoise Mbango Etone in 2008 - to win Olympic gold, have a baby and then return to successfully defend their crown.

Ennis-Hill flew in to Rio on Saturday after opting to miss the Team GB training camp in Belo Horizonte.

Instead she geared up for the Games in Europe - she declined to say where, only that it was "nothing glamorous or exciting" - in order to minimise the amount of time she would have to spend away from Reggie.

And Ennis-Hill, who had to overcome an Achilles injury earlier in the year, but is now feeling "fit and healthy", is inspired by the chance to create memories in Rio that Reggie can treasure.

"It was so nice having him there (at her training camp), coming down to thetrack and doing his little bit of hurdling alongside me," she said.

"Every time I ran, he was going, 'Mummy, go, go, go'.

"He's aware of everything now, he knows what mummy does, he tries to copy what I do.

"He will have all those memories, DVDs, pictures, to look back on.

"I would love my performances to be great out in Rio, to show what him what his mum achieved just two years after he was born."

Ennis-Hill is also looking to become the first British woman to retain anOlympic title in athletics.

"I see it as a massive challenge for me," she said.

"Last year (when she won the world title in Beijing in her first major competition since giving birth) was a massive challenge and I feel like the odds are a little bit against me because it's a huge thing to achieve.

"But it's a really amazing position to be in.

"I relish this opportunity to go out there and see if I can do somethingreally amazing at this stage in my career."

Her chief competition in Rio will come from Canada's world number one Brianne Theisen-Eaton and team-mate Katarina Johnson-Thompson, who looks to be over the long jump troubles which threatened to ruin her chances.

"Mentally, I've got to be 100 per cent focused," said Ennis-Hill, who firedout a warning of her own by running her second fastest time ever in the 100metres hurdles - 12.76 seconds - last month.

"Physically, I'm going to have to be at the best I've been for the past fewyears.

"I've just got to hold everything together and know that I've done this beforeand that I can do it again."