Image source, Rex Features

If you're looking for minor upsets, there could be one brewing in Gloucestershire today as a Cheltenham side flying high in second place in League Two visit mid-table League One outfit Crewe Alexandra.

Michael Duff's Robins will be hoping to emulate the run to the fifth round achieved by Cheltenham under Steve Cotterill in 2001-02 when they beat then second-tier Burnley before losing to West Brom.

David Artell's Crewe, meanwhile, have only reached round three once in the past 10 seasons, a record they will be bidding to improve against a team who eliminated them from this competition four years ago.

The Railwaymen did once reach the FA Cup semi-finals but that was way back in 1888. That's before TV was invented - which reminds us, this is another game you can watch on iPlayer and right here using the play icon at the top of the page.

Extra-time half-time. Morecambe edge it. Just.

In one of four games you can watch live on the BBC Sport website and iPlayer today, Bradford City and Oldham Athletic, both of League Two, meet at Valley Parade.

Bradford have progressed in each of their last three FA Cup ties against Oldham, with this their first meeting in the competition since a 5-1 victory for the Bantams in January 1987.

But Oldham have won five of their last six away games in the FA Cup, including their first-round match this season against Hampton & Richmond.

In the balance.

Image source, Rex Features

So very nearly an equaliser out of nowhere.

It's a routine ball over the top, and Cameron Archer fires a volley against the side netting from a tight angle.

This game isn't won just yet.

Five minutes left until extra-time half-time.

Morecambe look comfortable in defence.

They look set to reach the third round for just the fourth time in their history.

Very little has happened in the second period at Priestfield. There's ten to go in Kent.

Exeter have this one wrapped up.

All Solihull at the moment.

A lot of sideways passes though. No penetration.

Solihull substitute Jamie Ward channels his inner David Beckham v Wimbledon and tries to catch the keeper off his line.

His shot from inside his own half goes well wide.

Nervy start, but no chances of note.

Extra-time gets under way.

Who you backing?

Image source, Getty Images

It's more than 12 years since Portsmouth lifted the FA Cup for the second time in their history by beating Cardiff 1-0 in the 2008 FA Cup final.

Pompey went on to finish runners-up to Chelsea two years later and after a sequence of early exits that coincided with their slide down the leagues, they enjoyed another fine run in the competition last season before losing to eventual winners Arsenal in the last 16.

Today, though, they take on the role of giants to be slayed by welcoming National League side King's Lynn Town, who shocked League Two side Port Vale in round one and are bidding to reach round three for only the second time.

It's been a long wait for the Linnets since their previous third round appearance in 1961-62 but Pompey have won eight of their past nine games against non-league opposition - remember, you can watch Kings Lynn attempt to cause a giant-killing on the BBC Red Button, iPlayer and right here on the BBC Sport website.

So this one is still to be decided but we have five other games coming up at 15:00 GMT, including three more you can watch live on this very page, as well as on BBC iPlayer...

Yep, the ref blows his whistle. We do go to extra-time!

Nothing to separate the League Two and National League sides. We'll have another 30 live on the BBC Sport website with you shortly.

The ball drops to Solihull's Stephen Gleeson who fires from range.

Well wide. Will that be the last chance of normal time?

Keeper collects and a member of the Solihull dugout says a very rude word which the microphones pick up. Sorry if you heard that on our commentary.

Free-kick for Solihull. Time to launch the ball upfield.

Five minutes added on.

This game looks set for extra time.