Matteo Guendouzi - Arsenal - receive yellow card for a foul.
Hand ball by James McArthur - Crystal Palace
Corner - Arsenal. Conceded by Joel Ward.
Fouled by Matteo Guendouzi - Arsenal
Wilfried Zaha - Crystal Palace - won a free kick in defence.
Substitution - Crystal Palace. James McCarthy for Cheikhou Kouyaté.
Shot blocked. Wilfried Zaha - Crystal Palace - shot with left foot from the centre of the box is blocked. Assist - Christian Benteke with a head.
Corner - Crystal Palace. Conceded by Sokratis.
Fouled by Christian Benteke - Crystal Palace
Fouled by Sokratis - Arsenal
Sead Kolasinac - Arsenal - won a free kick in defence.
Christian Benteke - Crystal Palace - won a free kick on the left wing.
Second Half ended - Arsenal 2, Crystal Palace 2.
BOOKING: Mattéo Guendouzi
SUBSTITUTION: James McCarthy COMES ON FOR Cheikhou Kouyaté
New attacking attempt. David Luiz - Arsenal - shot with left foot from the centre of the box is saved in the top centre of the goal. Assist - Alexandre Lacazette.
Joel Ward - Crystal Palace - won a free kick in defence.
Corner - Arsenal. Conceded by Wayne Hennessey.
Fouled by Alexandre Lacazette - Arsenal
Shot blocked. Pierre-Emerick Aubameyang - Arsenal - shot with right foot from outside the box is blocked. Assist - Nicolas Pépé.
Corner - Arsenal. Conceded by James Tomkins.
Andros Townsend - Crystal Palace - won a free kick in defence.
Fouled by Bukayo Saka - Arsenal
VAR Decision: No Goal Arsenal 2-2 Crystal Palace.
GOAL OVERTURNED BY VAR: Sokratis - Arsenal - scores but the goal is ruled out after a VAR review.
Missed chance. Alexandre Lacazette - Arsenal - shot with the head from the centre of the box missed. Assist - Nicolas Pépé with a cross after corner.
Fouled by Calum Chambers - Arsenal
Luka Milivojevic - Crystal Palace - won a free kick in defence.
Corner - Arsenal. Conceded by Gary Cahill.
Substitution - Crystal Palace. Christian Benteke for Jordan Ayew.
SUBSTITUTION: Christian Benteke COMES ON FOR Jordan Ayew
Matteo Guendouzi - Arsenal - won a free kick in defence.
Fouled by Wilfried Zaha - Crystal Palace
Fouled by Cheikhou Kouyaté - Crystal Palace
Bukayo Saka - Arsenal - won a free kick in defence.
Fouled by Sead Kolasinac - Arsenal
Substitution - Arsenal. Sead Kolasinac for Kieran Tierney.
SUBSTITUTION: Sead Kolasinac COMES ON FOR Kieran Tierney
Wilfried Zaha - Crystal Palace - won a free kick in attack.
Missed chance. Wilfried Zaha - Crystal Palace - shot with right foot from outside the box goes high. Assist - Patrick van Aanholt.
Alexandre Lacazette - Arsenal - hits the right post with a shot with right foot from a diffucult position on the right. Assist - Matteo Guendouzi with a through ball.
James McArthur - Crystal Palace - won a free kick in attack.
Fouled by Dani Ceballos - Arsenal
Missed chance. Nicolas Pépé - Arsenal - shot with left foot from outside the box goes high from a free kick.
Dani Ceballos - Arsenal - won a free kick in attack.
Fouled by Jordan Ayew - Crystal Palace
New attacking attempt. Alexandre Lacazette - Arsenal - header inside of six yard box - left side is saved by goalkeeper in the centre of the goal. Assist - Nicolas Pépé with a cross.
Corner - Arsenal. Conceded by James McArthur.
Matteo Guendouzi - Arsenal - won a free kick on the right wing.
Offside - Crystal Palace. Wayne Hennessey with a pass, however Jordan Ayew is in offside.
New attacking attempt. Matteo Guendouzi - Arsenal - shot with right foot from outside the box is saved in the left corner. Assist - Dani Ceballos.
Missed chance. Calum Chambers - Arsenal - shot with left foot from the centre of the box is close, but misses the top left corner.
SUBSTITUTION: Bukayo Saka COMES ON FOR Granit Xhaka
Substitution - Arsenal. Bukayo Saka for Granit Xhaka.
Shot blocked. Wilfried Zaha - Crystal Palace - shot with left foot from the left side of the box is blocked. Assist - Jordan Ayew.
Offside - Arsenal. Sokratis with a pass, however Alexandre Lacazette is in offside.
Fouled by David Luiz - Arsenal
Jordan Ayew - Crystal Palace - won a free kick in defence.
Goal! Arsenal 2, Crystal Palace 2. Jordan Ayew - Crystal Palace - shot with the head from the right side of the six yard box to the centre of the goal. Assist - James McArthur with a cross.
Calum Chambers - Arsenal - receive yellow card for a foul.
Andros Townsend - Crystal Palace - won a free kick on the left wing.
Shot blocked. Gary Cahill - Crystal Palace - shot with the head from the centre of the box is blocked. Assist - Patrick van Aanholt with a cross.
Jordan Ayew - Crystal Palace - won a free kick in attack.
Andros Townsend - Crystal Palace - won a free kick on the right wing.
Fouled by Kieran Tierney - Arsenal
First Half ended - Arsenal 2, Crystal Palace 1.
Fouled by Joel Ward - Crystal Palace
Alexandre Lacazette - Arsenal - won a free kick in defence.
New attacking attempt. Patrick van Aanholt - Crystal Palace - shot with right foot from the centre of the box is saved by goalkeeper in the centre of the goal. Assist - Cheikhou Kouyaté.
Second Half starts Arsenal 2, Crystal Palace 1.
Missed chance. Nicolas Pépé - Arsenal - shot with right foot from the centre of the box is close, but missed. Assist - Pierre-Emerick Aubameyang.
Alexandre Lacazette - Arsenal - won a free kick in attack.
Fouled by James Tomkins - Crystal Palace
Corner - Arsenal. Conceded by Luka Milivojevic.
Corner - Arsenal. Conceded by Cheikhou Kouyaté.
Shot blocked. Jordan Ayew - Crystal Palace - shot with right foot from the centre of the box is blocked.
Fouled by Andros Townsend - Crystal Palace
Sokratis - Arsenal - won a free kick on the right wing.
Missed chance. Jordan Ayew - Crystal Palace - shot with right foot from long distance on the left missed. Assist - James McArthur.
Corner - Crystal Palace. Conceded by Granit Xhaka.
Goal! Arsenal 2, Crystal Palace 1. Luka Milivojevic - Crystal Palace - converts the penalty with a shot with right foot to the right corner.
VAR Decision: Penalty Crystal Palace.
Penalty conceded by Calum Chambers - Arsenal - after a foul in the penalty area.
Penalty Crystal Palace. Wilfried Zaha draws a foul in the penalty area.
Fouled by Granit Xhaka - Arsenal
Missed chance. Kieran Tierney - Arsenal - shot with right foot from outside the box missed to the left after corner.
Corner - Arsenal. Conceded by Patrick van Aanholt.
Gary Cahill - Crystal Palace - won a free kick on the left wing.
Missed chance. Pierre-Emerick Aubameyang - Arsenal - shot with right foot from outside the box missed to the left. Assist - Matteo Guendouzi following a fast break.
Corner - Crystal Palace. Conceded by Calum Chambers.
New attacking attempt. Alexandre Lacazette - Arsenal - shot with left foot from the centre of the box is saved in the left corner. Assist - Kieran Tierney with a cross.
Missed chance. Alexandre Lacazette - Arsenal - shot with the head from the centre of the box missed to the left. Assist - Nicolas Pépé with a cross after corner.
Goal! Arsenal 2, Crystal Palace 0. David Luiz - Arsenal - shot with right foot from few metres to the top left corner after corner.
GOAL! Sokratis Papastathopoulos!
Goal! Arsenal 1, Crystal Palace 0. Sokratis - Arsenal - shot with right foot from the centre of the box to the right corner. Assist - Granit Xhaka with a head after corner.
New attacking attempt. James McArthur - Crystal Palace - shot with the head from the centre of the box is saved by goalkeeper in the centre of the goal. Assist - Andros Townsend with a cross.
Thats all. Game finished - Arsenal 2, Crystal Palace 2.
The teams are on their way out of the tunnel - and we're about to get underway at Emirates Stadium