Manchester United haven't been at their sparkling best in these opening two games of the season but their formidable record against Newcastle United at this ground will have them feeling confident. The Magpies have won just once at Old Trafford in the Premier League era, a 1-0 victory in December 2013 during David Moyes' reign in charge.
Official line ups will be with us in about five minutes.
FULL TIME: Manchester United 1-1 Arsenal
Five minutes of time added on.
United look very nervous at the back at the moment, no one seems prepared to play a forward pass, apart from Valdes, that is. Last change for Arsenal as Flamini replaces Sanchez.
United find a bit of composure and venture forward, finding Valencia down the right. He launches a cross in that Fellaini can nod back across goal with van Persie lurking, but he lashes his effort over the bar.
United have collapsed here and Ramsey is inflicting the damage, lifting another excellent pass into the box for Giroud. The Frenchman has the goal at his mercy, but Smalling his across just in time to apply pressure and eventually wins a goal kick for his side.
Arsenal should have a second! Ozil's neat run around the defence is picked out by Sanchez and the German can cut the ball back to Giroud, but he drills his shot into the side netting.
Arsenal are level! A raking pass from right to left from Ramsey finds Walcott just inside the box. He takes on Blackett and his cross takes a big deflection off the United youngster and loops over Valdes before finding the back of the net.
Goal! Manchester United 1-1 Arsenal (Tyler Blackett OG)
Blackett goes forward, looking for a return pass from Fellaini but the Belgian is dispossessed and Arsenal can take advantage of the space down their right. They think they can, that is, but Young is back to dispossess Ramsey and has shows fine composure to play a simple pass and relieve the pressure on his side. It's been another outstanding performance from the ex-Villa winger, who really should be in contention when Roy Hodgson announces his England squad this Thursday.
Young dances his way past Coquelin and races his way up the byline, looking to cut the ball back to van Persie but Mertesacker reads it and diverts it out.
Giroud flicks the ball into Ramsey who turns a neat ball out to his left for Walcott to run onto. He's gotten inside Blackett, but the Arsenal man is just offside.
Tyler Blackett has also come on for Rojo and there will also be a debut for Victor Valdes. De Gea trots down the tunnel, unable to continue after picking up that knock and the ex-Barcelona star enters the fray.
De Gea brilliantly punches away a Arsenal corner but needs a bit of treatment when the ball goes out of play. It allows the Gunners to make a couple of changes of their own with Jack Wilshere and Theo Walcott coming on for Cazorla and Bellerin.
Rojo has been guilty of giving the ball away a couple of times in the last few minutes but he's just saved his side. Ramsey brilliantly controls a ball over the top and clips it over the onrushing De Gea, only for the Argentine to get across and hammer it away in the nick of time.
Smalling is all over Giroud in the resulting corner but nothing is given and De Gea can claim, launching a sublime ball for Young to chase down with just the goal (and Ospina) in front of him. Young's quick, but Bellerin is quicker, tearing back to intercept and keep Arsenal in this.
Arsenal again come close as Sanchez slips a ball through for Ramsey after a driving run from Ozil, but Rojo slides across in the nick of time to put the ball out.
Arsenal are almost in as Giroud brilliantly rolls Rojo inside the six yard area after Ozil's pass, but De Gea is out to block his shot on goal. The Gunners get the corner, but work nothing from it.
First change of the game sees Robin van Persie come onto replace Falcao. The Colombian gives a sad wave to the crowd as he makes his way to the bench. That could be the last time Old Trafford sees him.
Ramsey is able to burst forward down the inside right channel with Blind desperately trying to get back. The Welshman floats a ball over to Ozil but his first time knock down into the path of Giroud is hammered clear by Smalling.
A neat flick from Blind looks to have freed Young down the inside left flank but Koscielny stepped up just in time to rule him offside.
Interesting stat from the first half.