Well, Wycombe are absolutely flying now!

Portsmouth seem to have completely switched off at the back and the two early goals have given the hosts real sense of energy.

It's one-way traffic.

Nick Mashiter
BBC Sport football news reporter at Villa Park

Image source, Getty Images

Niclas Fullkrug was sprinting after a clearance, pulled up and immediately signalled he needed to come off. The striker has already missed three months of the season with an Achilles injury and only returned in December.

West Ham are forced into a change then, just 15 minutes into the game.

Niclas Fullkrug is replaced by Danny Ings. I don't think West Ham have any strikers after Ings. He's the last one.

Dion Dublin
Former Aston Villa striker on BBC Radio 5 Live

I think it's Niclas Fullkrug's groin.

Image source, Getty Images

The last thing West Ham need is another forward out injured.

Fullkrug is signalling to the bench that he needs to come off.

Aston Villa win a corner but Youri Tielemans' cross is headed away.

Oh no, what's this? West Ham's Niclas Fullkrug has gone down off the ball, clutching his hamstring.

Nick Mashiter
BBC Sport football news reporter at Villa Park

Fist pumps from Graham Potter as the sizeable away following in the Doug Ellis Stand celebrate Lucas Paqueta's goal.

Image source, Getty Images

No VAR until the fifth round remember. Although there were no hints of offside anyway.

Dion Dublin
Former Aston Villa striker on BBC Radio 5 Live

Image source, Getty Images

A great start.

A ping across the pitch and Crysencio Summerville has Ian Maatsen in front of him and he waits, he plays a square ball across the box and Paqueta steers it into the gap.

A beautiful finish.

Portsmouth are still enjoying plenty of the ball and are probably on top, but Wycombe are making some good moves in the final third.

Gideon Kodua - who set up the hosts' opener - is proving a real handful.

Dion Dublin
Former Aston Villa striker on BBC Radio 5 Live

West Ham are being a lot more secure with the ball.

There's no sloppy passing and they're picking the right pass with the right weight.

Dion Dublin
Former Aston Villa striker on BBC Radio 5 Live

West Ham making the pitch as big as possible.

West Ham's centre-halves and full-backs are the ones making the pitch big.

There's a lot of running from the Villa players very early on.

Nick Mashiter
BBC Sport football news reporter at Villa Park

Villa are wearing a black kit this evening, to mark the club's 150th anniversary. It's the colour Villa first wore before making the switch to claret and blue.

Though, given how cold it is this evening, it might have been worth knitting some gloves and bobble hats to go with it.

Ross Barkley tries to ping a pass over the top but his ball is straight at Lukasz Fabianski.

Villa's Ian Maatsen is then flagged for offside.

A slow, steady start.

This Aston Villa kit is brilliant. Big numbers on the back, no names. Minimalist.

Villa have yet to get on the ball though. Bright start from West Ham.

Image source, Reuters

Early chance already for West Ham who break down the left.

Lucas Paqueta picks the ball up on the edge of the box and unleashes a fierce strike which only just whistles wide.

Don't think the keeper had it covered you know.