Timo Werner stripped and ready on the touchline as the Blues win yet another corner.
The striker is made to wait for the set-piece that Leno punches clear before he can enter the fray for international teammate Havertz.
84'
Ziyech twisting and turning before dancing his way into the box.
The winger attempts to pick up Havertz making a run at the back post but Cedric gets back to clear.
81'
Ziyech makes his return from injury to replace Mount.
79'
Balogun is on for Martinelli.
78'
WHAT A SAVE!!
Leno at his best. Mount clips a wonderful ball straight into Lukaku's path. He powers a header at goal from eight yards but Leno is across quickly to get a hand to it and pushes it onto the crossbar.
72'
Kovacic is replaced by Kante.
68'
SHOT!
From the free kick, Arsenal win the first ball but it drops out to Kovacic on the volley. He takes it on from 20 yards but it sails way over the crossbar.
66'
Tavares is on to replace Tierney.
63'
SAVE!
Martinelli runs at the Chelsea defence and tries to thread a pass through to Aubameyang. Azpilicueta makes the block, but the Gabonese still takes possession. He fires at goal, but his effort is comfortably saved by Mendy.
61'
Saka is replaced by Aubameyang.
58'
SHOT!
Chelsea go a bit more direct into Lukaku and he sets up Mount from 20 yards. It opens up nicely for him but he drags a poor finish off target.
57'
Chelsea win a corner but Smith Rowe manages to hoof it clear. Chelsea have to start again by playing out from the back but there always seems a spare man for them.
51'
OFFSIDE!
The home are lifted by a positive charge by Tierney down the left. Smith Rowe looks like he's away in behind but the offside flag is raised as Martinelli was ahead of the play. Better.
48'
Chelsea dominating.
Lukaku is keeping on where he left off, pinning Mari into the box. Twice he's backed into the Arsenal defender inside the box but he wasn't able to get a shot away.
45'
Second Half begins..
H-T'
ARSENAL 0-2 CHELSEA
41'
PENALTY APPEAL....NOT GIVEN!
Saka gets on the wrong side of James who puts an arm across him. Saka hits the deck and all eyes are on referee Tierney, who waves it away.
VAR takes a look....but agrees with the on-field call.
35'
GOAL! ARSENAL 0-2 CHELSEA (James, 35')
34'
YELLOW!
Mari is all over the place vs Lukaku. He decides this time to charge through the back of him. Clear foul. Clear yellow
27'
Mount rolls the ball into the feet of Lukaku, who turns his man and fires towards goal. However, Holding gets back to make a vital block to stop his strike.
25'
Arsenal have to have a period of possession to calm proceedings. Chelsea are looking a threat every time they push forward.
18'
Few groans from the home fans. Tierney plays a hopeful punt over Martinelli straight through to Mendy.
15'
GOAL! ARSENAL 0-1 CHELSEA (Lukaku, 15')
12'
Superb change of pace from Pepe gets him away from Alonso, who gets burnt down the line. Arsenal playing with great energy in the final third so far.
8'
Rudiger's misplaced header drops to Saka who finds Tierney on the overlap.
5'
BLOCK!
Xhaka is back on.
4'
Xhaka stays down on the deck after taking a blow, but he appears to be okay.
2'
SHOT!
Fast start by Arsenal. Xhaka clips a ball to Saka who knocks it down to Smith Rowe about 22 yards out.
1'
First Half begins..
'
WHITE MISSING AFTER POSITIVE COVID TEST
Arsenal defender Ben White has been ruled out of this London derby after testing positive for Covid.
'
Arsenal Starting XI To Face Chelsea: Leno, Soares, Holding, Mari, Tierney, Lokonga, Xhaka, Pepe, Smith Rowe, Martinelli, Saka.
ARSENAL - Lineup
The striker is made to wait for the set-piece that Leno punches clear before he can enter the fray for international teammate Havertz.
The winger attempts to pick up Havertz making a run at the back post but Cedric gets back to clear.
Leno at his best. Mount clips a wonderful ball straight into Lukaku's path. He powers a header at goal from eight yards but Leno is across quickly to get a hand to it and pushes it onto the crossbar.
From the free kick, Arsenal win the first ball but it drops out to Kovacic on the volley. He takes it on from 20 yards but it sails way over the crossbar.
Martinelli runs at the Chelsea defence and tries to thread a pass through to Aubameyang. Azpilicueta makes the block, but the Gabonese still takes possession. He fires at goal, but his effort is comfortably saved by Mendy.
Chelsea go a bit more direct into Lukaku and he sets up Mount from 20 yards. It opens up nicely for him but he drags a poor finish off target.
The home are lifted by a positive charge by Tierney down the left. Smith Rowe looks like he's away in behind but the offside flag is raised as Martinelli was ahead of the play. Better.
Lukaku is keeping on where he left off, pinning Mari into the box. Twice he's backed into the Arsenal defender inside the box but he wasn't able to get a shot away.
Saka gets on the wrong side of James who puts an arm across him. Saka hits the deck and all eyes are on referee Tierney, who waves it away.
VAR takes a look....but agrees with the on-field call.
Mari is all over the place vs Lukaku. He decides this time to charge through the back of him. Clear foul. Clear yellow
Xhaka is back on.
Fast start by Arsenal. Xhaka clips a ball to Saka who knocks it down to Smith Rowe about 22 yards out.
Arsenal defender Ben White has been ruled out of this London derby after testing positive for Covid.
Chelsea - Lineup