- David Luiz sent off for high tackle on Sead Kolasinac.
- Shkodran Mustafi header ruled out for offside. Aaron Ramsey hits the post in first half.
- First goalless draw between both sides in 12 years.
Well that is all we have time for on this particular live blog. Head here for coverage of Manchester United against Everton, where Wayne Rooney returns to his former club.
Full time: Chelsea 0-0 Arsenal
Well not a pretty game but credit to Arsenal, who have come to their bogey ground and showed real character to get a point from the champions Chelsea. Both sides had chances in the first half but they dried up after the break. The major incident was the red card given to David Luiz for a high tackle on Sead Kolasinac.
Kolasinac is fortunate to escape being sent off himself. Having just been booked he screams at the linesman are a free-kick is awarded on the right.
Fabregas swings in the cross but Cech takes the ball cleanly.
Four added minutes at Stamford Bridge.
It is all Arsenal now who have a numerical advantage for the final minute plus stoppage time. Morata off to be replaced by Christiansen to bolster that defence. Can Arsenal snatch an unlikely win?
RED CARD! David Luiz (Chelsea)
A flashpoint right at the end of the game here and Chelsea are down to 10-men. Luiz is raiding down the right, he loses control of the ball and in an attempt to challenge Kolasinac, dives in on the Bosnian and catches him high on the shin. Michael Oliver has no choice but to show a red card.
Five minutes left at Stamford Bridge and it has all gone a bit frantic. Not much cohesive football to speak of to be honest. Not sure either side have done enough to win this.
Eden Hazard has an opportunity to make an impression, toying with Arsenal on the edge of the box before his shot is plucked out of the air by Cech.
Ball in the net for Arsenal! But it won't count. Xhaka's free-kick picks up an unmarked Mustafi, who nods beyond Courtois but he was beyond the last defend when the ball was whipped in. Fifteen minutes left for winner to be found.
Danny Welbeck down with a groin issue it looks like, just after Lacazette was taken off instead of him; as luck would have it.
Eden Hazard on for Chelsea as they try to force a winner. Willian replaced.
Alexis Sanchez on for Alexandre Lacazette. Not sure the Arsenal faithful will like that. Twenty-four minutes left.
Yellow card for Alvaro Morata, who barges into Mustafi. Pretty harsh to be perfectly honest.
Sead Kolasinac darts into the box but can't get his cross away.
Meanwhile, Alexis Sanchez is warming up.
Gary Lineker has his say on the David Luiz yellow card.
David Luiz goes for an acrobatic effort in the Arsenal box and connects with Laurent Koscielny instead of the ball. Endangering an opponent? Michael Olivier shows a yellow card to the Brazilian. Penny for Sadio Mane's thoughts.
It is Pedro, who missed that big opportunity in the first half, who makes way. All the players are back and we're back under way in the second half.
Tiemoue Bakayoko warming up and preparing to come on for Chelsea. Find out who he replaces in a moment.
Half time: Chelsea 0-0 Arsenal
Well then, this hasn't gone with the script. Chelsea have been sluggish and slow, while Arsenal have been spirited and lively in attack at times. Both sides have had chances but and Pedro, Aaron Ramsey and Alexandre Lacazette will all feel they should have done better. The visitors have more than held their own while the champions have been anything but their best. An interesting second half to follow.
How have Arsenal not scored!?
Aaron Ramsey stumbles his way through and when his shot hits the post Lacazette is on hand to batter the ball goalwards, but he inexplicably can't find the target from five yards. An awful miss, to be frank.
Five minutes until half time and this has not been the one-way traffic some might have expected. Arsenal have been more than competitive and have created the odd chance themselves. Chelsea made a good start but have been sloppy.
Granit Xhaka takes aim from 30 yards and it thunders into the hoarding behind the goal and into the side netting. Bit of a lull in proceedings it must be said.