Pepe is withdrawn for the Arsenal as Holding comes on to shore up the backline.
63'
GOAL!!! MARTINELLI EQUALISES OUT OF NOTHING!!! 1-1!
45+1'
2 minutes of added-on time.
45'
Hudson-Odoi takes on Martinelli down the right before delivering a cross for Kovacic, who sends a weak header wide of the target.
41'
Arsenal enjoy a strong spell of possession to keep the ball away from the Blues and potentially limit the danger until half-time.
39'
Finally some sustained pressure from Arsenal after a cross narrowly evades Martinelli, but Emerson does enough to contain Pepe before eventually conceding a corner.
36'
Arteta is prepared to stick with this current 4-4-1 formation, at least until half time.
32'
Hudson-Odoi plays a one-two with a teammate before seeing a half-volley with the outside of his foot punched clear by Leno.
28'
GOAL! CHELSEA 1-0 ARSENAL (JORGINHO)
26'
Red card David Luiz
23'
Chelsea win a corner down the left flank and play it short with Emerson releasing Hudson-Odoi. However, the winger overhits his delivery out for a goal-kick.
21'
Yellow Card to Emerson.
20'
Bukayo Saka wins a free kick in the defensive half.
16'
Hudson-Odoi collects and he tries to curl an effort over the top of Leno to surprise the Arsenal keeper. The ball does loop over Leno, but it strikes the top of the bar before bouncing over.
15'
Tammy Abraham header from the centre of the box is saved in the centre of the goal.
14'
Corner, Chelsea. Conceded by Gabriel Martinelli.
10'
Attempt missed. Andreas Christensen header from very close range is close, but misses to the right.
9'
Chelsea probe down the right once more as Hudson-Odoi makes a dangerous run, forcing Xhaka into action to clear behind for a corner.
4'
Lacazette charges down Kepa's clearance from the back and it allows Pepe to seize on a loose ball. The Frenchman wins a corner for his team to put the pressure on the Blues.
3'
Tammy Abraham wins a free kick in the attacking half.
Chelsea - Lineup
ARSENAL - Lineup