Wycombe's third goalscorer Steven Craig is coming off. He's being replaced by 18-year-old Millwall loanee Fred Onyedinma.

Plymouth's players look a bit dejected now but they need to find a spark from somewhere in this last 20 minutes.

One goal would give them at least a little bit of hope to take to Adams Park on Thursday.

The ineffective Reuben Reid comes off for Plymouth and is replaced by Ryan Brunt.

It's fair to say the Pilgrims' top scorer hasn't had much service tonight.

Another chance for Wycombe and it's Aaron Holloway again. He picks up the ball on the edge of the box and blasts a shot just over the bar. It must have taken a deflection as a corner is given but it comes to nothing.

James Law
BBC Sport at Home Park

Image source, PA

"For a side that has kept 21 clean sheets in the league this season, Plymouth are looking extremely fragile at the back.

"Since Paul Hayes' half-time substitution, Sam Wood has moved up top with Matt Bloomfield coming into midfield, and Wycombe have continued to outwit the hosts.

"It puts the Pilgrims in an unenviable position - do they go gung-ho and try to get to within touching distance for the second leg, or are we approaching the damage limitation stage?

"The wooden dug-outs at Home Park make it impossible to see, but the Wycombe bench must be in dreamland."

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Suddenly this game has boiled over and both sets of players are clashing in the middle of the pitch.

It was sparked after Plymouth's Anthony O'Connor appeared to go in with his elbow on Matt Bloomfield. O'Connor is booked.

Very lucky not to see red there.

Alex: 3-0!! Come on Wycombe!! Make this safe now!! Phenomenal turnaround in fortunes this season! Ainsworth needs a statue built!!

Andy: I don't expect Plymouth to get back into this as Sheridan doesn't do plan B's.

Tie over? Use #bbcfootball on Twitter.

Plymouth need some attacking options here. They bring on Jason Banton and Zak Ansah for Carl McHugh and Gethin Jones.

Guy Branston
Ex-Plymouth and Wycombe defender, BBC 5 live sports extra

"How you concede that is beyond me. They gone to sleep and we've talked about them switching off in the first half. They switched off again, a simple ball and nobody goes across to Craig. It's a great finish but you've got to be marking him."

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Oh dear, Plymouth's defence has completely switched off there and this tie is as good as over.

Wycombe have a free-kick close to the halfway line, Sam Saunders plays it quickly straight through the defence to Steven Craig in the box and Craig finishes past Luke McCormick.

First chance of the half falls to the visitors. Aaron Holloway knocks the ball back to Sam Wood on the edge of the box but he scuffs his shot wide.

I wonder what John Sheridan said to his players at half-time? They certainly need more from 20-goal striker Reuben Reid. He hasn't really been in the game so far.

We're back under way at Home Park. What a huge half for Plymouth Argyle - you feel they need at least one goal to keep themselves in the tie.

But we've already heard that Wycombe's away record is superb this season. Someone needs to step up for the Pilgrims.

Wycombe have made a change at half-time. Midfielder Matt Bloomfield is coming on for goalscorer Paul Hayes, who's sitting on the bench with a huge bandage around his head.

Alex: Wycombe cannot afford to settle for 2 goals, given last week's result. Need to make this comfortable early. Great first half!

Drew: This one's finely poised. Either Plymouth get a goal back and it's all on again, or someone gets a silly second yellow and it's all over. Plymouth have very, very rarely come from behind to win under John Sheridan - but a goal or two would make the world of difference.

Let's see what the second period has to offer. Under way again shortly...

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Preston take a 1-0 lead into their League One semi-final second leg against Chesterfield, courtesy of their win at Proact Stadium on Thursday. Kick-off at Deepdale is at 12:15 BST.

At 18:35 BST, Stevenage and Southend play the first of their League Two tie.

There's live text commentary of both games here on the BBC Sport website.

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So it's advantage Wycombe at half-time. Will they hold on at Home Park, or is there a way back for Plymouth?

Get in touch using #bbcfootball on Twitter.

James Law
BBC Sport at Home Park

"The sun is beginning to set at Home Park, but are Plymouth's promotion chances also fading into the darkness?

"There's no away goals rule in the play-offs, but the Chairboys are executing the perfect away performance here.

"It's the 800 Wycombe fans who are making all the noise, and history could be repeating itself - the home team has failed to score in the last five games between these sides."

The boos were ringing around Home Park as the players walked down the tunnel.

The home fans clearly weren't happy with referee Peter Bankes following Wycombe's second goal in which Steven Craig appeared to handle the ball in the build-up.

They will need to get behind their team in the second half though, otherwise this tie could be done and dusted.

Guy Branston
Ex-Plymouth and Wycombe defender, BBC 5 live sports extra

"I've been in one of those rollockings from John Sheridan and he'll be getting in people's faces. He can lose his rag for the right reasons, because Plymouth have been second best.

"Gareth Ainsworth will say 'more of the same' because they're in the driving seat and they'll have to have a really drastic change as a group to lose this one."

Bobby Reid launches a free-kick into the box but once again a Wycombe defender clears the ball behind.

The corner is whipped in towards Anthony O'Connor but he can't connect and the ball goes behind.

That's the final action of an eventful first half.