Ewww. A horrid slice from Olympiakos defender Francisco Ortega as he tries to clear a cross gifts a corner to West Ham.

These have been situations from which the Hammers have looked threatening and James Ward-Prowse has the quality to deliver.

Right into the danger-zone and it needs away centre-back Jackson Porozo to bravely head away under pressure.

Ernest Poku is straight into the action but Emiliano Martinez rushes out of his box to stop him - and the flag goes up anyway.

AZ Alkmaar make a triple sub. Ernest Poku, Djordje Mihailovic and Myron van Brederode are on.

Simon Stone
BBC Sport at the London Stadium

A surge of energy has gone through what has been a pretty drab game so far.

Jarrod Bowen has gone on a couple of enterprising runs, James Ward-Prowse had a shot saved and Said Benrahma had one blocked.

West Ham need to keep their foot on the accelerator.

More signs of life from West Ham.

This time, Said Benrahma pops up in the box but can't test the keeper.

Image source, Getty Images

Feels like Jarrod Bowen will have more of an impact from a wider area.

Moments after teeing up that chance James Ward-Prowse, the Hammers forward creates something out of nothing on the right.

Olympiakos keeper Alexandros Paschalakis bravely and boldly comes out to collect the high ball.

Better from West Ham.

Jarrod Bowen peels off to the left and causes a nuisance, cutting back intelligently to James Ward-Prowse.

However, he can't connect cleanly and its goes straight at the Olympiakos keeper.

A very decent chance.

Moussa Diaby shuffles onto his left foot in the box and has a shot blocked. Villa on top now.

Jarrod Bowen has been ploughing a lone furrow up top for West Ham.

The England international gamely darts along the line in a vain attempt to reach a hopeful ball from Lucas Paqueta, but it is a poor quality pass and easily cut out.

Joe Rindl
BBC Sport at Villa Park

It had been coming. Back into the team, Diego Carlos rises highest to grab his first goal for Villa.

AZ's players are furious, and they have a point. Replays show Boubacar Kamara's shot didn't take a deflection and should have been a goal kick, not a corner.

AZ Alkmaar are understandably furious, and Villa are very fortunate to be level.

Because a replay confirms it was just a terrible shot by Boubacar Kamara. Jordy Clasie didn't touch the ball and it should have been a goal-kick, not a corner.

Huge chance for Villa. Boubacar Kamara skies a shot from six yards out. It's bouncing and Jordy Clasie is sliding in but still. It's a corner actually...

Will David Moyes roll the tactical dice soon?

Feels like he needs to do something different in a bid to make things click.

Mohammed Kudus has some magic in his boots, showing that when he takes down a difficult ball with a deft touch, before Said Benrahma knocks over a poor cross.

Emiliano Martinez hurls himself at a cross to stop it reaching Vangelis Pavlidis for a big 2-0 chance.

Not even at the hour mark and it is time for an Olympiakos change.

Former Manchester City forward Stevan Jovetic, who has not been heavily involved, is replaced by Ayoub El Kaabi.

El Kaabi goes straight into the thick of the action, trying to get on the end of a corner which West Ham clear.

Joe Rindl
BBC Sport at Villa Park

AZ goalscorer Vangelis Pavlidis now has 15 goals in 18 matches for his club this season.

His run was fantastic and his finish was even better, dinking the ball over Emiliano Martinez.

Villa work the ball across to Youri Tielemans, whose first-time sweeping shot from 25 yards is straight at Mat Ryan.

Simon Stone
BBC Sport at the London Stadium

We have only had three minutes of the second half and the Olympiakos physio is on for a second time to treat one of the visiting players.

The West Ham fans evidently think there is some gamesmanship at play - both players have continued.

It means there has been zero flow to this second period so far.

Liverpool

Liverpool boss Jurgen Klopp, speaking to TNT Sports: "We were not aggressive enough. We gave balls easily away. Real mistakes. With all the possession you have obviously you should create more but you cannot concede three goals here, that makes no sense. They fought harder and it was deserved. Congratulations to Toulouse.

"You can play as good as you want but if you don't win decisive battles you have no chance in football.

"We scored a third one, I think it was a goal 100%. It was pretty long ago the ball was in a tricky situation, I am not even sure it just the hand at all but that is how it is.

"We don't have a point, but at least we can learn from it. The boys have to decide how we want to play. We can be a very good football team, but without winning defensive challenges, nope."