This is Arsenal's first trip to Fratton Park in the FA Cup since 2004.

Can't remember what happened?

Clue: Long sleeves, gloves, Nike Mercurials...

Thoughts on the teams? Portsmouth have made some tweaks amid a packed fixture list... surprising? No Ozil, no Aubameyang in the Arsenal squad... should Arteta have gone stronger?

Let us know using #bbcfootball

Portsmouth make six changes from Friday's 3-0 win over Rochdale, with captain Tom Naylor and top scorer Ronan Curtis dropping to the bench.

Ross McCrorie, Steve Seddon, Ben Close, Gareth Evans, Marcus Harness and Ellis Harrison all come into the team.

Only two of Arsenal's XI who started their Europa League defeat by Olympiakos keep their place - with Pablo Mari making his debut at centre-back.

Eddie Nketiah, Gabriel Martinelli and Joe Willock are among the players to start. Alexandre Lacazette and Nicolas Pepe are on the bench.

Portsmouth: Bass, McCrorie, Bolton, Burgess, Seddon, Close, McGeehan, Williams, Evans, Harness, Harrison.

Arsenal: Martinez, Sokratis, Luiz, Mari, Saka, Guendouzi, Torreira, Nelson, Willock, Martinell, Nketiah.

Here is the team news we promised you. Hope you've not already stuck a pound on Pierre-Emerick Aubameyang to be first goalscorer...

Neil Johnston
BBC Sport

Image source, Getty Images

"All of Disney's sports films had the same theme - the triumph of the underdog. With Portsmouth we hope to get it right in fact, not fiction."

Michael Eisner is not your typical League One club owner.

A leader in the American entertainment industry for four decades - including stints at the helm of Paramount Pictures and The Walt Disney Company - the high-flying American businessman's net worth is estimated at $1bn (£760m).

Since August 2017 the 77-year-old has been in charge of Portsmouth, a club flirting with oblivion a few years ago, and pays $7 a match (£5.42) to watch Pompey on the club's official streaming service when he is unable to fly to England from California.

Read the full article here

'What's all the Disney/film chat about?' is what you might be wondering.

In short, Portsmouth owner Michael Eisner used to run The Walt Disney Company.

And Will Ferrell AKA Ron Burgundy (as if you don't know) has also been turning up at Fratton Park.

If you want more depth then my colleague Neil Johnston is your man...

Bad news for Pompey. Skipper Tom Naylor and talisman Ronan Curtis are only fit enough for the bench.

Arsenal's side has a more youthful look than a grad ball. David Luiz is one of the few experienced heads.

Full deets to come shortly...

First things first, the team sheets have been scrawled out and handed in to the ref...

Hello there! If schadenfreude storylines are your thing, gripping dramas punctured with unimaginable plot twists as the main protagonist lurches through financial turmoil towards death, then you might have enjoyed Portsmouth's sad decent towards oblivion.

Or if you're a Southampton fan.

But, for the more empathetic of us, their survival and subsequent resurrection has been as heart-warming as Mickey saving Minnie from a dastardly villain.

Tonight, League One side Pompey are aiming to provide more drama by knocking out the once-mighty Arsenal of the FA Cup...

Image source, Getty Images

Like a bolt out of the blue, fate steps in and sees you through

When you wish upon a star, your dreams come true...

Image source, Getty Images

Whether it is Mickey Mouse, Simba, Elsa or [insert your favourite character here], Disney confidently asserts it has been making dreams come true across the world for the past century.

Portsmouth, with the help of a former Disney executive, are hoping for a fairytale tonight...

Image source, Getty Images