Advantage West Ham at the halfway stage.

Chance as Jarrod Bowen chips in a cross but Danny Ings can't head it goalwards.

Pablo Fornals crosses but it's claimed by AZ keeper Mat Ryan. Sixty seconds to go.

One minute ticks by. West Ham have possession on the halfway line.

Glenn Murray
Former Brighton striker on BBC Radio 5 Live

The last thing West Ham want is to have a sting in the tail [from Alkmaar]. They want to see this game out.

They need to manage this game better. They just seem to be sleepwalking into the second leg, all the momentum has gone.

Three minutes added on.

West Ham change. Goalscorer Said Benrahma is given a standing ovation as he's replaced by Pablo Fornals.

Into the final minute of normal time. AZ's Evangelos Pavlidis has a shot blocked before Yukinari Sugawara mishits a cross into row z.

Big chance!

An error from Rui Patrício allows Jeremie Frimpong to snatch in but his goalbound effort is blocked.

There's appeals for a penalty but Michael Oliver waves them away.

That they are Glenn.

Jarrod Bowen collects the ball down the right but nobody is running in to tap home his fierce pass across the face of goal.

Glenn Murray
Former Brighton striker on BBC Radio 5 Live

As we tick into the last five minutes, West Ham look the fitter and stronger side, despite having played three games since their quarter-final tie.

They are definitely finishing this game the stronger of the sides.

All West Ham but Tomas Soucek's looping header is straight at AZ keeper Mat Ryan.

Funnily enough, AZ are now taking their goal kicks very quickly.

Oh that would have been lovely.

West Ham move brilliantly down the left with Said Benrahma carving clear. He plays in Danny Ings who then sets the winger up with a cheeky backheel.

The move comes to nothing though as Benrahma's first-time shot goes miles over the bar.

Less than 10 minutes to go. What do West Ham do now? Try and grab a third to seal it?

And West Ham do make that change now. Danny Ings on, Michail Antonio off.

AZ also make a change as Djordje Mihailovic comes on for Myron van Brederode.

West Ham were planning to bring on Danny Ings for Michail Antonio right before that goal, apparently.

Paul Pogba is on for Juventus too.

He's been on for just under 10 minutes but Juve are still trailing in Turin.

Glenn Murray
Former Brighton striker on BBC Radio 5 Live

This is what we expected the tie to be like from the beginning, West Ham are in the ascendancy and Antonio has put them in front for the first time in this tie.

There would have been a penalty had Antonio not kicked it in fro close range as the defender kicks it onto his own arm to keep it out of the net.

Antonio is sharp, he reacts first to stab the ball home to put West Ham in front.

Image source, PA Media