Duncan Tompkins:  Outstanding performance from @J_Ennis, external#bbcathletics, external#inspirational, external

Josh McClean: @J_Ennis, external what a performance #bbcathletics, external#yorkshire, external

Jonathan Fellows:  Jessica Ennis- Hill take a bow, that was brilliant.

Steve Cram
BBC athletics commentator

"What a picture, what a story. Jessica Ennis-Hill is back winning gold medals."

Image source, Getty Images

Jessica Ennis-Hill embraces her coach Toni Minichiello then poses for pictures with silver medallist Brianne Theisen-Eaton and Laura Ikauniece-Admidina who won bronze. 

Ennis-Hill's points tally was 6669. Foor those interested, Ikauniece-Admidina recorded a Latvian heptathlon record of 6516. 

Steve Backley
Four-time European javelin champion on BBC TV

"Jess has made everything go right for her. It's amazing to think that even up to a month ago she was uncertain as to whether she would come here to compete."

Image source, Reuters

Kelly Sotherton
Former British heptathlete on BBC Radio 5 live

"I am really over the moon for Jess. That is one super woman. She is unbelievable - and on her way to becoming a legend. 

"None of her performances here were outstanding but they were consistent and I see no reason why she can't do even better in Rio and defend her title."

In May, Jessica Ennis-Hill finished fourth in Gotzis and was unsure whether she would compete in Beijing. Up until a few weeks ago she was still undecided. The Briton only started serious training in November after the birth of her son, Reggie, last July, but she's once again on top of the world. Incredible. 

Denise Lewis
Olympic heptathlon gold medallist on BBC TV

"She's won it comprehensively, and she's won it in style."

Steve Cram
BBC athletics commentator

"What a performance from a true, true champion. If she wasn't already the darling of British athletics then goodness me, she is now. This is what it's all about - years of training to show that athletics can be pure and great and inspirational."

Jessica Ennis-Hill wins the 800m in 2:10.13. Coach Toni Minichiello high-fives a member of his team on the sidelines. The world champion collapses onto the track, hiding her face with her hands. 

Image source, Getty Images

Jessica Ennis-Hill overtakes Brianne Theisen-Eaton with 20m or so to go and the gold medal is hers. In her first major championships since London 2012, the Olympic champion becomes the world champion and that's an incredible achievement. 

Image source, Getty Images

Canada's Brianne Theisen-Eaton was the favourite coming into these championships and although her season's best is only slightly slower than Jessica Ennis-Hill (2:09.37). She should not be able to snatch the gold medal from the Briton. 

The Canadian leading with 200m but Ennis-Hill clawing back the advantage...

Image source, Getty Images

What's happening on the track? Jessica Ennis-Hill, heptathlon leader, is on the start line for the 800m. The Olympic champion has a six-second cushion and she is by far the quickest athlete on paper, with a personal best of 2:07.81. Her season's best is 2:09.21. 

The line-up for the men's 100m has been announced. Usain Bolt is in lane five, while Justin Gatlin is in lane seven, so they won't be sprinting down the track shoulder-to-shoulder.

Michael Johnson
BBC Sport athletics expert & 400m world record holder

Interesting chat between Michael Johnson and Daley Thompson on KJT's heptathlon.

"A sports psychologist isn't what's needed, and that's a big bonus because that would be a difficult thing to deal with. I don't want to second-guess a coach, but this is about the coach and the athlete sitting down after the championship, reflecting on what went wrong and changing things."

It's that time of the afternoon. For today's vote we're asking: Who do you think will win the 100m?

The vote (on this page) will close at 14:00 BST so you've got time to compose yourselves, deliberate and make your decision.

"This is the last place I wanted to be right now. I had to compete," Katarina Johnson-Thompson tells Phil Jones. The interview ends. The Liverpudlian's eyes fill up with salty tears and the heptathlete receives a hug from Jones and the tears flow. 

Image source, BBC Sport

Darren Campbell
Former British sprinter on BBC Radio 5 live

"Katarina Johnson-Thompson will come back stronger from this. She's not an average athlete. This is a big defining moment in her young career."

Denise Lewis
Olympic heptathlon gold medallist on BBC TV

KJT takes it easy in the heptathlon 800m

"My heart goes out to KJT. Who can judge? She's being very courageous having to do this. Imagine the agony of being put in this situation? It's almost humiliating for her. 

"She can't pull out if she wants to compete in the long jump and she's decided just to plod round."

Image source, Getty Images

Johnson-Thompson last coming down the home straight, running at a plodder's pace. The Briton - who was second overall after day one - crosses the line and sighs. A day full of ifs and buts for the Liverpudlian.