I think it took us all by surprise how quickly the game turned around!

Portsmouth attack again and Kyle Bennett finds Gary Roberts in the area, but the forward thinks he has more time than he actually does and the ball is taken away from him by the visitors.

We'll have four minutes added on time, presumably for Paul Cook and Paul Wotton's dismissals.

Image source, Rex Features

Now in temporary charge on the sidelines tonight, Leam Richardson has been here before. He was in charge of Accrington Stanley for the majority of the 2012-13 season with a win percentage of just under 30%. 

So far, not so good for Richardson in the Portsmouth dugout as Paul Cook watches on from the stands.

Image source, Rex Features

Portsmouth midfielder Danny Hollands is the first player in the referee's book for a foul on Graham Carey on the edge of the area.

Carey picks himself up then comes agonisingly close to putting Plymouth into an even better position with the free-kick, but he hits the side-netting.

Some of the Devonians thought that was in... (Are they called Devonians?)

Closer, closer, closer for Portsmouth. After Marc McNulty overhits a cross meant for Gary Roberts, Ben Davies rescues the ball and somehow finds Kyle Bennett to the left of goal.

Winger Bennett controls it and smashes against the post. Plymouth keeper Luke McCormick put his hands up to leave it. That's a risky game.

Adam Williams
BBC Sport at Fratton Park

"Plymouth look a real threat every time they counter-attack on Portsmouth.

"Gregg Wylde and Graham Carey are regularly finding space down the left and giving Christian Burgess a torrid time.

"While Pompey press for that all important equaliser, which they arguably should've had  by now through Evans and McNulty, they look liable to concede a third goal."

Portsmouth are knocking on the door now. A ball forward falls to Marc McNulty, scorer of the first goal of the game, but his fierce half volley is just wide of the post.

Real chance for Portsmouth. Plymouth can't clear a corner and Pompey centre-back Christian Burgess nods it down to Gareth Evans, but he can't control it properly and allows the Pilgrims defence to get the ball away.

Portsmouth are finding it very hard to break though Plymouth's defensive set-up. They just aren't allowing them any time or space in the final third.

Plymouth are counter attacking superbly, with Jamille Matt just unable to connect with a low Gregg Wylde cross.

Graham Carey's left foot has proved devastating in League Two this season, and he almost shows it again here.

The Plymouth midfielder is given too much space and has a pop from 30 yards out which sneaks just past the post, with a thankful debutant keeper Ryan Allsop looking on.

Yep, I remember the League Two play-off final between Southend and Wycombe myself Josh - I was there! Crazy game.

Portsmouth try to respond, backed by a vociferous crowd but Danny Hollands can't properly get hold of a cross-field ball inside the area, and his cross falls kindly for goalkeeper Luke McCormick.

Adam Williams
BBC Sport at Fratton Park

"Explosive isn't the word to do the start to this one justice.

"The Green flares that the travelling Argyle fans have let off after both of those Jamille Matt goals mean Fratton Park now smells a bit like a TA training ground rather than a football stadium.

"Some might say Matt is lucky to still be on the field after that off-the-ball incident with Pompey captain Michael Doyle."

Image source, Rex Features

Matt's goal gives us the same scoreline that both of these matches in the regular League Two season finished - 2-1 to the visiting side.

Honestly, though, I wouldn't bet on it staying that way.

I've barely been able to catch my breath so far. If every play-off game is like this then we're in for an absolute treat.

With manager Paul Cook in the stands, his assistant Leam Richardson is taking charge from the sidelines. 

Question: how does Cook get messages down to his staff these days? I remember the days of wireless headsets...

The thunderous start to this match continues as a smartly worked free-kick finds itself with Pompey forward Gary Roberts free in the Plymouth area, but it's on his weaker foot and his tame shot is easily cleared.