Alexandre Lacazette - Arsenal - won a free kick in defence.
Fouled by Semi Ajayi - West Bromwich Albion
Shot blocked. Matheus Pereira - West Bromwich Albion - shot with left foot from the centre of the box is blocked. Assist - Conor Townsend.
Goal! Arsenal 3, West Bromwich Albion 1. Willian - Arsenal - from a free kick with a shot with right foot to the top left corner.
Corner - West Bromwich Albion. Conceded by Rob Holding.
Willian - Arsenal - won a free kick in attack.
Fouled by Kyle Bartley - West Bromwich Albion
Shot blocked. Willian - Arsenal - shot with right foot from outside the box is blocked. Assist - Gabriel Magalhães.
Offside - West Bromwich Albion. Matt Phillips with a pass, however Hal Robson-Kanu is in offside.
Missed chance. Calum Chambers - Arsenal - shot with right foot from outside the box goes high.
Missed chance. Darnell Furlong - West Bromwich Albion - shot with the head from the centre of the box goes high. Assist - Matheus Pereira with a cross .
Conor Gallagher - West Bromwich Albion - won a free kick in attack.
Fouled by Alexandre Lacazette - Arsenal
Okay Yokuslu - West Bromwich Albion - won a free kick in defence.
Fouled by Bukayo Saka - Arsenal
Conor Gallagher - West Bromwich Albion - won a free kick in defence.
Fouled by Alexandre Lacazette - Arsenal
Conor Gallagher - West Bromwich Albion - receive yellow card for hand ball.
Substitution - Arsenal. Thomas Partey for Dani Ceballos.
Hand ball by Conor Gallagher - West Bromwich Albion
SUBSTITUTION: Thomas COMES ON FOR D. Ceballos
Missed chance. Darnell Furlong - West Bromwich Albion - shot with the head from the centre of the box is close, but missed. Assist - Matt Phillips with a cross.
Conor Townsend - West Bromwich Albion - won a free kick in defence.
Fouled by Nicolas Pépé - Arsenal
Offside - West Bromwich Albion. Matheus Pereira with a pass, however Semi Ajayi is in offside.
Fouled by Dani Ceballos - Arsenal
Conor Gallagher - West Bromwich Albion - won a free kick in defence.
Dani Ceballos - Arsenal - receive yellow card for a foul.
SUBSTITUTION: G. Diangana COMES ON FOR C. Robinson
Substitution - West Bromwich Albion. Grady Diangana for Callum Robinson.
Goal! Arsenal 2, West Bromwich Albion 1. Matheus Pereira - West Bromwich Albion - shot with left foot from outside the box to the right corner. Assist - Conor Townsend following a fast break.
Offside - Arsenal. Bukayo Saka with a pass, however Alexandre Lacazette is in offside.
Substitution - Arsenal. Kieran Tierney for Emile Smith Rowe.
SUBSTITUTION: K. Tierney COMES ON FOR E. Smith Rowe
Hal Robson-Kanu - West Bromwich Albion - receive yellow card for a foul.
Mohamed Elneny - Arsenal - won a free kick in defence.
Okay Yokuslu - West Bromwich Albion - won a free kick in defence.
Fouled by Calum Chambers - Arsenal
Fouled by Hal Robson-Kanu - West Bromwich Albion
SUBSTITUTION: A. Lacazette COMES ON FOR Martinelli
Substitution - Arsenal. Alexandre Lacazette for Gabriel Martinelli.
Corner - West Bromwich Albion. Conceded by Bernd Leno.
Corner - West Bromwich Albion. Conceded by Nicolas Pépé.
Shot blocked. Matt Phillips - West Bromwich Albion - shot with right foot from outside the box is blocked. Assist - Matheus Pereira.
Corner - West Bromwich Albion. Conceded by Dani Ceballos.
Corner - West Bromwich Albion. Conceded by Rob Holding.
Substitution - West Bromwich Albion. Hal Robson-Kanu for Mbaye Diagne.
SUBSTITUTION: H. Robson-Kanu COMES ON FOR M. Diagne
Fouled by Okay Yokuslu - West Bromwich Albion
Emile Smith Rowe - Arsenal - won a free kick in attack.
Shot blocked. Gabriel Martinelli - Arsenal - shot with right foot from the centre of the box is blocked.
New attacking attempt. Emile Smith Rowe - Arsenal - shot with right foot from outside the box is saved in the top right corner.
New attacking attempt. Nicolas Pépé - Arsenal - shot with left foot from the right side of the box is saved in the right corner.
Corner - Arsenal. Conceded by Sam Johnstone.
Second Half starts Arsenal 2, West Bromwich Albion 0.
First Half ended - Arsenal 2, West Bromwich Albion 0.
New attacking attempt. Bukayo Saka - Arsenal - shot with left foot from a diffucult position on the left is saved in the left corner. Assist - Willian.
Corner - Arsenal. Conceded by Sam Johnstone.
Missed chance. Calum Chambers - Arsenal - shot with right foot from outside the box is very close to the goal. Assist - Willian after corner.
Shot blocked. Gabriel Magalhães - Arsenal - shot with the head from the centre of the box is blocked. Assist - Bukayo Saka with a cross.
Corner - Arsenal. Conceded by Semi Ajayi.
Corner - Arsenal. Conceded by Darnell Furlong.
Missed chance. Gabriel Martinelli - Arsenal - shot with right foot from outside the box is close, but misses the top right corner. Assist - Willian.
Fouled by Mbaye Diagne - West Bromwich Albion
Gabriel Magalhães - Arsenal - won a free kick in defence.
Gabriel Magalhães - Arsenal - won a free kick in defence.
Fouled by Mbaye Diagne - West Bromwich Albion
Goal! Arsenal 2, West Bromwich Albion 0. Nicolas Pépé - Arsenal - shot with left foot from the right side of the box to the top left corner. Assist - Calum Chambers.
Mbaye Diagne - West Bromwich Albion - won a free kick in defence.
Fouled by Rob Holding - Arsenal
Goal! Arsenal 1, West Bromwich Albion 0. Emile Smith Rowe - Arsenal - shot with left foot from the centre of the box to the centre of the goal. Assist - Bukayo Saka with a cross.
Corner - Arsenal. Conceded by Semi Ajayi.
Corner - Arsenal. Conceded by Conor Townsend.
Dani Ceballos - Arsenal - won a free kick in attack.
Fouled by Matt Phillips - West Bromwich Albion
New attacking attempt. Mohamed Elneny - Arsenal - shot with right foot from outside the box is saved by goalkeeper in the centre of the goal. Assist - Willian.
Missed chance. Mbaye Diagne - West Bromwich Albion - shot with right foot from few metres missed. Assist - Matheus Pereira with a cross.
Shot blocked. Kyle Bartley - West Bromwich Albion - shot with right foot from outside the box is blocked.
Missed chance. Matheus Pereira - West Bromwich Albion - shot with left foot from outside the box is close, but missed to the left. Assist - Semi Ajayi following a fast break.
Callum Robinson - West Bromwich Albion - hits the bar with a shot with right foot from the centre of the box. Assist - Conor Townsend with a cross.
Shot blocked. Callum Robinson - West Bromwich Albion - shot with right foot from the left side of the box is blocked. Assist - Conor Townsend.
Missed chance. Matheus Pereira - West Bromwich Albion - shot with left foot from outside the box is close, but missed to the left.
Missed chance. Calum Chambers - Arsenal - shot with right foot from outside the box missed to the left.
Missed chance. Nicolas Pépé - Arsenal - shot with left foot from the centre of the box goes high. Assist - Gabriel Martinelli.
Willian - Arsenal - won a free kick in defence.
Fouled by Darnell Furlong - West Bromwich Albion
Corner - West Bromwich Albion. Conceded by Rob Holding.
Missed chance. Matheus Pereira - West Bromwich Albion - shot with left foot from outside the box missed after corner.
The teams are on their way out of the tunnel - and we're about to get underway at Emirates Stadium