New attacking attempt. Willian - Arsenal - shot with left foot from the right side of the box is saved in the left corner. Assist - Dani Ceballos.
Second Half ended - West Bromwich Albion 0, Arsenal 4.
Offside - West Bromwich Albion. Charlie Austin with a pass, however Kyle Bartley is in offside.
Corner - West Bromwich Albion. Conceded by Bernd Leno.
New attacking attempt. Rekeem Harper - West Bromwich Albion - shot with left foot from outside the box is saved in the right corner. Assist - Matheus Pereira.
Missed chance. Joseph Willock - Arsenal - shot with the head from the centre of the box missed to the left. Assist - Willian with a cross.
New attacking attempt. Conor Gallagher - West Bromwich Albion - shot with right foot from outside the box is saved by goalkeeper in the centre of the goal. Assist - Callum Robinson.
Shot blocked. Charlie Austin - West Bromwich Albion - shot with right foot from outside the box is blocked. Assist - Dara O Shea.
Callum Robinson - West Bromwich Albion - won a free kick in defence.
Dani Ceballos - Arsenal - receive yellow card for a foul.
Fouled by Dani Ceballos - Arsenal
Fouled by Joseph Willock - Arsenal
Corner - Arsenal. Conceded by Darnell Furlong.
SUBSTITUTION: Rekeem Harper COMES ON FOR M. Phillips
Substitution - West Bromwich Albion. Rekeem Harper for Matt Phillips.
New attacking attempt. Pierre-Emerick Aubameyang - Arsenal - shot with left foot from the left side of the box is saved in the left corner. Assist - Kieran Tierney.
Missed chance. Charlie Austin - West Bromwich Albion - shot with right foot from the centre of the box goes high. Assist - Matt Phillips.
Fouled by Romaine Sawyers - West Bromwich Albion
Alexandre Lacazette - Arsenal - won a free kick in defence.
Offside - Arsenal. Pierre-Emerick Aubameyang with a pass, however Emile Smith Rowe is in offside.
Substitution - Arsenal. Joseph Willock for Emile Smith Rowe.
SUBSTITUTION: Joe Willock COMES ON FOR E. Smith Rowe
Missed chance. Pierre-Emerick Aubameyang - Arsenal - shot with left foot from few metres goes high. Assist - Willian.
Missed chance. Willian - Arsenal - shot with left foot from the centre of the box missed to the left. Assist - Kieran Tierney with a cross.
Substitution - Arsenal. Willian for Bukayo Saka.
SUBSTITUTION: Willian COMES ON FOR Bukayo Saka
Conor Gallagher - West Bromwich Albion - receive yellow card for a foul.
Missed chance. Dani Ceballos - Arsenal - shot with right foot from outside the box missed to the left. Assist - Emile Smith Rowe.
Substitution - West Bromwich Albion. Kyle Bartley for Branislav Ivanovic.
SUBSTITUTION: Kyle Bartley COMES ON FOR Branislav Ivanović
Pierre-Emerick Aubameyang - Arsenal - won a free kick on the left wing.
GOAL! Alexandre Lacazette!
Goal! West Bromwich Albion 0, Arsenal 4. Alexandre Lacazette - Arsenal - shot with right foot from few metres to the high centre of the goal. Assist - Kieran Tierney with a cross.
Corner - West Bromwich Albion. Conceded by Ainsley Maitland-Niles.
GOAL! Alexandre Lacazette!
Shot blocked. Emile Smith Rowe - Arsenal - shot with left foot from the centre of the box is blocked.
Goal! West Bromwich Albion 0, Arsenal 3. Alexandre Lacazette - Arsenal - shot with right foot from the centre of the box to the centre of the goal.
Fouled by Branislav Ivanovic - West Bromwich Albion
Offside - Arsenal. Pierre-Emerick Aubameyang with a pass, however Alexandre Lacazette is in offside.
New attacking attempt. Alexandre Lacazette - Arsenal - shot with right foot from a diffucult position on the right is saved by goalkeeper in the centre of the goal. Assist - Dani Ceballos with a through ball.
SUBSTITUTION: A. Maitland-Niles COMES ON FOR Héctor Bellerín
Substitution - Arsenal. Ainsley Maitland-Niles for Héctor Bellerín.
Missed chance. Darnell Furlong - West Bromwich Albion - shot with the head from the centre of the box missed. Assist - Callum Robinson with a cross.
Offside - West Bromwich Albion. Dara O Shea with a pass, however Matheus Pereira is in offside.
SUBSTITUTION: Charlie Austin COMES ON FOR G. Diangana
Second Half starts West Bromwich Albion 0, Arsenal 2.
Fouled by Héctor Bellerín - Arsenal
First Half ended - West Bromwich Albion 0, Arsenal 2.
Substitution - West Bromwich Albion. Charlie Austin for Grady Diangana.
Grady Diangana - West Bromwich Albion - won a free kick in defence.
New attacking attempt. Alexandre Lacazette - Arsenal - shot with right foot from a diffucult position on the left is saved in the left corner. Assist - Kieran Tierney.
Fouled by Conor Gallagher - West Bromwich Albion
Conor Gallagher - West Bromwich Albion - won a free kick on the left wing.
Héctor Bellerín - Arsenal - receive yellow card for a foul.
Missed chance. Semi Ajayi - West Bromwich Albion - shot with the head from the centre of the box is close, but missed. Assist - Matt Phillips with a cross after corner.
Corner - West Bromwich Albion. Conceded by Rob Holding.
New attacking attempt. Rob Holding - Arsenal - shot with the head from the centre of the box is saved by goalkeeper in the centre of the goal. Assist - Bukayo Saka with a cross.
Corner - Arsenal. Conceded by Matt Phillips.
Corner - Arsenal. Conceded by Sam Johnstone.
Corner - Arsenal. Conceded by Romaine Sawyers.
Shot blocked. Pierre-Emerick Aubameyang - Arsenal - shot with right foot from outside the box is blocked. Assist - Alexandre Lacazette.
Goal! West Bromwich Albion 0, Arsenal 2. Bukayo Saka - Arsenal - shot with left foot from few metres to the centre of the goal. Assist - Emile Smith Rowe.
Missed chance. Alexandre Lacazette - Arsenal - shot with right foot from outside the box is high and wide to the right.
Goal! West Bromwich Albion 0, Arsenal 1. Kieran Tierney - Arsenal - shot with right foot from the left side of the box to the top right corner. Assist - Rob Holding.
New attacking attempt. Matt Phillips - West Bromwich Albion - shot with right foot from the right side of the box is saved by goalkeeper in the centre of the goal. Assist - Matheus Pereira with a through ball.
Missed chance. Bukayo Saka - Arsenal - shot with left foot from the right side of the box is close, but missed to the left. Assist - Dani Ceballos.
Missed chance. Kieran Tierney - Arsenal - shot with left foot from outside the box is high and wide to the left .
Emile Smith Rowe - Arsenal - won a free kick on the right wing.
Corner - Arsenal. Conceded by Dara O Shea.
New attacking attempt. Bukayo Saka - Arsenal - shot with right foot from the right side of the box is saved in the right corner. Assist - Alexandre Lacazette.
Emile Smith Rowe - Arsenal - won a free kick in defence.
Shot blocked. Bukayo Saka - Arsenal - shot with left foot from the centre of the box is blocked.
New attacking attempt. Héctor Bellerín - Arsenal - shot with right foot from the right side of the box is saved in the right corner. Assist - Alexandre Lacazette.
Offside - West Bromwich Albion. Darnell Furlong with a pass, however Callum Robinson is in offside.
Thats all. Game finished - West Bromwich Albion 0, Arsenal 4.
The teams are on their way out of the tunnel - and we're about to get underway at Emirates Stadium