The 4ft 8ins US gymnast star, who won four golds in Rio, sizes herself up against the 7ft 1ins and former NBA star Shaquille O'Neal ahead of the big game in Houston. 

Tom Brady has just been asked if he will retire if he wins tonight. He is 39 after all.

"HELL NO!"

A definitive answer. 

It's a team sport but perhaps the chief among team sports where one position hogs all of the headlines.

If you're a casual observer you'd be forgiven that it's all about the quarterback. And, to be honest, it quite often is.

Image source, Getty Images

We've got two of the very best on display in Houston tonight.

In the Patriots corner, Tom Brady. He's won four Super Bowls already, is friends with Donald Trump, married a supermodel and played himself on The Simpsons.

He's about as household as household names get. He's also, despite being banned for the first four games of the season, still very good at the age of 39.

Image source, EPA

In the Falcons corner, Matt Ryan.

Voted MVP [Most Valuable Player] for the regular season already he's in the form of his life and hasn't thrown an interception in two months.

But he isn't friends with POTUS. And he isn't married to Gisele.

Super Bowl LI between the Atlanta Falcons and New England Patriots is not long off now. 

You can listen on BBC Radio 5 live from 23:00 GMT or watch TV coverage on BBC One from 23:20 GMT. 

Image source, Getty Images

Here's BBC Get Inspired's guide to everything you need to know about American football and how you can get involved in your very own 'game day'.

Fancy taking it to the next level? Why not join one of the many UK based teams looking for players, external or join a taster session in your area.

BBC Three is at the Super Bowl in Houston, Texas, meeting the fans who have travelled long distances to be at the biggest game in American sport.  

The first Super Bowl I watched was Buffalo v Washington in 1992. I set it to record overnight but drastically underestimated the length of both the game and a standard VHS tape. 

Got to about the third quarter and then out. I never did see the end...

Tom Tanner: Finished work for today, been out cycling, pizzas in the oven, beers in the fridge. I'm pumped and waiting. Let's do this SB51.

Prof Guff: A strong cup of coffee at 10 on a Sunday night can only mean one thing - #supersunday, external

Jarleath Eaton: My first #SuperBowl, external was SB39. The Patriots won their third in four years. 13 SBs later, they'll be celebrating again. 31-28.

As ever, please get in touch with us through the night. You can text us on 81111 (UK Only) or, even better, send us some pictures and thoughts to #bbcnfl.

Tonight's first few lines of debate:

1. Who are you supporting tonight, and why? The more tenuous link to each team, the better 

2. What are your Super Bowl night traditions, if any. What are you eating, who are you with?

3. What time are you staying up till and what time do you need to be at work?

With just under an hour until kick-off the teams are out warming up at the NRG Stadium in Houston.

The roof has been closed tonight because of potential stormy weather, so that one variable has been removed from the equation.

A shame that there's no chance of a Prince-style performance tonight. In many ways. 

With the cheering crowds and countless cameras battling through the arena floor, the media day gives an opportunity for reporters, presenters and pranksters to light up the event in their own unique way.

The game kicks off at 23:30 GMT and finishes - well, it's hard to say for sure.

Pencil in a 04:00 GMT finish though. Approximately. 

Welcome aboard, one and all. Between now and about 04:00 GMT it's wall to wall touchdowns, Hollywood stars, half-time shows, pizzazz and fanfares.

One of sport's biggest events. Can you stay with us all the way to full time? Come on! 

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The greatest show on turf.

Or so they say.

A seventh Super Bowl in 15 years v a second appearance ever.

A dynasty v a devastating attack.

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Best defence v best attack.

The team [most of] America loves to hate v the team [most of] America wants to see win.

Deflate-gate v no controversy at all.

Image source, AP

If it's the one time a year you follow the NFL, tonight's the night.

Image source, Getty Images

Pull up an easy chair, fill your face with food and DO NOT FALL ASLEEP. Lady Gaga's on and everything.  

Image source, Getty Images