Simon Stone
BBC Sport at the London Stadium

When West Ham move the ball quickly, they have an edge in class.

Olympiakos didn't get their angles right defensively, which allowed Said Benrahma the space to get a decent shot away.

With the pace of Mohammed Kudus on the right, West Ham should create chances.

While there have been some encouraging signs for West Ham in an attacking sense, David Moyes' men have also had some defending to do from set-pieces.

Hammers centre-back Konstantinos Mavropanos - a Greece international - heads away a free-kick as the hosts hold firm.

Villa winger Leon Bailey swings in a shot from the corner of the box but it's headed over by AZ's Bruno Martins Indi.

Lucas Paqueta is making things tick for West Ham.

Another attacking move starts through the Brazilian in midfield and ends with Jarrod Bowen missing the target with a header.

Joe Rindl
BBC Sport at Villa Park

AZ have looked dangerous on the break and Greek forward Vangelis Pavlidis should have done better when that cross fell to him unmarked in the box.

Yes Villa have been the better side so far tonight, but they look fragile when AZ counter.

Villa's electric start is long forgotten. AZ winger Ibrahim Sadiq swings in a lovely cross but Vangelis Pavlidis fluffs his lines in the centre and scuffs his shot.

Lucas Paqueta x Said Benrahma is a tasty collab.

Paqueta weaves some magic in midfield to find space and pick out his team-mate, who bends a curling effort towards the bottom corner.

Away keeper Alexandros Paschalakis shovels the ball out for a corner and gathers a header by Nayef Aguerd from the resulting corner.

Good stuff from West Ham.

Corner to Villa. Hopefully he can stay onside if it comes back to him. It doesn't.

AZ come away.

Ten minutes on the clock and not really a settled pattern of play yet.

Plenty of endeavour from both sides but few glimpses of quality.

Calm as you like from from Olympiakos keeper Alexandros Paschalakis. Almost too calm.

He takes his time over a backpass, despite Jarrod Bowen haring towards him.

That was close to becoming a YouTube blooper.

AZ's Jordy Clasie latches onto a loose ball in midfield and shoots first time from 40 yards, with Emiliano Martinez off his line, but it flies wide.

First foray forward by Olympiakos and it results in a corner.

Captain Kostas Fortounis swings in the ball to Sotiris Alexandropoulos at the near post, with the latter claiming his flick goalwards hit the arm of Lucas Paqueta.

Not a chance.

The replay shows that the offside player was corner taker Moussa Diaby. He was still near the corner flag when Ollie Watkins' header was saved. Because it came back to him to cross in for Clement Lenglet, it was ruled out.

West Ham are pumped up.

Lucas Paqueta snaps at the heels of an Olympiakos midfielder inside the away half, Jarrod Bowen picking up the pieces and trying to thread back to the Brazilian.

Decent energy from the home side.

Joe Rindl
BBC Sport at Villa Park

The home fans can't believe it. It was the right call though.

Clement Lenglet is denied his first Villa goal.

A couple of ghosts from Premier League past are playing for Olympiakos.

Stevan Jovetic, a title winner with Manchester City, and on-loan Wolves forward Daniel Podence are part of visiting starting XI.

But they've hardly had a kick yet as West Ham start brightly.

A snapshot from Said Benrahma flashes wide.

Oh.

The goal is ruled out for offside. Nobody seems sure who was offside there. Including Unai Emery.

Video Assistant Refereepublished at 20:05 Greenwich Mean Time 9 November 2023

20:05 GMT 9 November 2023

Aston Villa 1-0 AZ Alkmaar

It's been chedcked for offside...

Early Villa attack, John McGinn and Moussa Diaby involved and Boubacar Kamara has a shot blocked.