Can Tatyana McFadden win a first of seven medals in Rio? Her sister Hannah is in the outside lane to her.

We're about to find out.

They're off in the women's T54 100m final...

Here's a personal insight into the USA's three-time Paralympic champion. 

One of the biggest names in Paralympic athletics is about to take to the track for the first of her seven gold medal events. 

She is arguably one of the greatest Paralympic athletes in history and here's why...

McFadden is the only athlete to win all four major marathons in London, New York, Chicago and Boston in 2013 while in the same year, she won five world titles on the track.

As a pure endurance athlete, the 100m isn't her favourite event but a win here could be the start of something special from wheelchair racing's superstar. 

Image source, BBC Sport

Image source, Reuters

The men's high jump T42 final is currently taking place and it's unbelievable.

Athletes with single-leg disabilities above the knee are hopping, rolling and flipping over the bar - all styles are on show.

Image source, Getty Images

Libby Clegg speaks to Channel 4 after winning T11 100m gold with her guide Chris Clarke: "It's not really hit me just yet. I'm over the moon - we ran a similar time in the semi.

"Almost being disqualified in the semis - these things happen. You have to get on with it and hope for the best.

"Chris has been fantastic. I had a change of guides in November and we started together in February."

Chris Clarke chips in with the quote of the night: "She's done all the work and I'm just here like John Terry."

Chelsea defender John Terry has a reputation for getting in on trophy celebrations after missing the Champions League final but still grabbing the spotlight.

What were you doing when you were 15? Ellie Robinson was winning Paralympic gold...

Jeanette Kwayke
Former Olympic sprinter on BBC Radio 5 live

It wasn't quite as quick as her heat, and after the turmoil her and Chris Clarke went through after being disqualified and then reinstated, that is understandable. 

But the others weren't much quicker and it was a solid performance from Clegg. Finally in her third Paralympic games she is a Paralympic champion.  

And they're off!

Ohhhh it's super sparkly from Terezhina Guilhermina - and the home crowd give her a very warm welcome.

GB's Libby Clegg is in lane three next to the Brazilian.

Loving the bling on Terezhina Guilhermina's eye mask in that photo below. Let's see what's she got for the final.

Brazil's Terezhina Guilhermina will be looking to take back her title as queen of the T11 sprint events for the visually impaired after Clegg broke her world records. 

Clegg was classified down from a T12 to a T11 and has lowered Guilhermina's personal bests ever since she first wore a blindfold, which is mandatory for all athletes in the T11 class. 

Even though Clegg, who has a deteriorating eye condition, finds it strange running with a blindfold, she's been determined to stay on top. 

Image source, BBC Sport

Image source, AP

As Elizabeth says, there was a big sigh of relief for Britain's Libby Clegg, whose Paralympics hokey cokey has fallen in her favour.

Clegg won her T11 100m heat in world record time earlier, but was subsequently disqualified because her guide Chris Clarke was deemed to have pulled her along in the race.

The British team appealed against the decision though, and she's been reinstated for tonight's final at 22:52 BST.

In. Out. In. Shake it all about.

Elizabeth Hudson
BBC Sport's Paralympics reporter in Rio

It's getting close to the time when Libby Clegg will race for gold in the T11 100m with guide Chris Clarke.

It looked good when the pair won their semi-final this morning in a world record time but they were disqualified and then later reinstated after an appeal.

Can Clegg win her first Paralympic gold after silver in London and Beijing?

After her gold medal and world record in the T37 100m final, Georgie Hermitage admitted to BBC Radio 5 Live's Jeanette Kwayke that she was shocked to run that fast.

"I was nervous so to run that fast was unbelievable," she said.

"The 100m is tough because the weakness in my body means it doesn't like doing sharp stuff.

"The 400m is the event I love but it is the most painful thing in the world."

Image source, BBC Sport

Elizabeth Hudson
BBC Sport's Paralympics reporter in Rio

Kadeena Cox has started what she would describe as a "crazy" 24 hours or so.

She won bronze here tonight in the T38 100m but tomorrow gets on her bike in the velodrome to compete in the C4-5 500m time trial on the track.

The 25-year-old from Leeds will go up against Britain's most successful female Paralympian Dame Sarah Storey, among others at 21:48 BST tomorrow and gold is definitely in her capabilities.

A medal of any colour would see her emulate Isabel Newstead who was the last Briton to win medals in two sports at the same Games when she did it in Seoul in 1988.

We've got GB's Libby Clegg up at 22:52 BST in the T11 100m final and later tonight it's the one that gets everyone all a flutter as Jonnie Peacock defends his T44 100m crown.

Right - let's go from the pool back to the track. More medals around the corner?

It's a safe bet, I reckon.