Teenage Kicks from The Undertones blares out on the Kassam Stadium PA as Karl Robinson and Kenny Jackett deliver more words of encouragement to both sets of players.

Not enough time to enjoy all of Fergal Sharkey's dulcet tones though as we're back under way for the second period.

As a result of the first semi-final second leg going to extra-time, the second tie between Wycombe and Fleetwood will now start at the slightly later time of 19:45 BST.

How very considerate of everyone involved to ensure the games don't overlap - you won't miss a thing with us.

Oxford finished strong there as Sam Long almost forces a ball across the Portsmouth area but Sean Raggett hooked it clear just before the whistle went.

Still they are level in this one....

One additional minute at the end of this first period of extra time...

Image source, Getty Images

Oxford midfielder Alex Gorrin booked for a full-blooded challenge on Andy Cannon.

Still everything being given here from both sides.

Another Oxford change sees James Henry make way for Anthony Forde.

That's four of the five permitted changes for the hosts now.

Last-ditch defending now for James Bolton as he has to get in the way of a Matty Taylor strike and deflect it behind for an Oxford corner.

Alex Bass claims well in the air as he comes out for it.

Portsmouth win another attacking free-kick but Lee Brown's effort is blocked initially and then James Bolton concedes a free-kick after losing control of the ball on the edge of Oxford's area.

More Pompey pressure goes begging.

Image source, Rex Features

Ryan Williams forces a corner for Portsmouth after another strong run down the right.

Some more deep breaths from both sets of players....and fans no doubt!

Nothing comes from it though for the visitors.

Ronan Curtis again fails to hit the target with a free-kick for Portsmouth on the edge of the box.

First real chance of extra time wasted.

No more changes to either side before we began extra time.

It appears Ronan Curtis picked up a yellow card in the dying moments beforehand though for a foul on Cameron Brannagan.

Rob Dickie is also booked now for a foul on John Marquis on the edge of his own box.

Very little hanging around between normal time ending and extra time starting.

Two teams switch ends after the coin toss so Oxford will continue to attack the closed end of the ground....

Rob Dickie so nearly the Oxford hero as a corner finds him at the back and he rises to head it, but that's gone wide to the right of goal.

That's it for the 90 minutes and we're heading to extra time....

Close again for Oxford as a free-kick heads into the danger area but Portsmouth get it clear somehow.

We're almost done in injury time....

Lee Brown involved up the other end now as twice he puts crosses in from the left, but there is nobody there for the Portsmouth finish...

Either side want to steal this then?

Lots of shouting still coming from both sets of players.

Oxford with a shout for a pen as Dan Agyei's shirt is almost pulled off his back by Lee Brown.

Nothing given though!

FIVE MINUTES ADDED ON.....

Nervy stuff now!

Ball pinging around penalty boxes at both ends as some tired bodies get in the way anyway they can.

Three minutes plus stoppages to come...

I'm putting money on my son finishing his bath, his bedtime story and getting to sleep before we know who's off to Wembley out of these two.

But Dan Agyei makes a first surging run for Oxford before he's eased out of the Portsmouth box and a goal kick follows.

Busy times in my household right now as my toddler heads up for his bath time.

Feel like saying to him, "you can't leave now, this is finely-balanced!" but he's only two and a half so he'll have time to appreciate the significance later in life...

Josh Ruffels meanwhile almost heads one on target for Oxford but it's time for a double change for the Yellows, Marcus Browne and Mark Sykes replaced by Jamie Hanson and Dan Agyei.