- Alex Oxlade-Chamberlain double seals easy win for the Gunners.
- Lucas Perez was forced off in second half after heavy challenge from Gravenberch.
- Olivier Giroud enjoyed bright 20 minute cameo after being left out of starting XI.
Easy stuff for the Gunners. A goal in each half for Alex Oxlade-Chamberlain seals their place in the fifth round of the EFL Cup.
Full-time: Arsenal 2-0 Reading
Three minutes of time added on here at the Emirates. This game is very much dead, however, with Arsenal heading for their 14th win out of 14 against the Royals.
Kermorgant winds back his right foot and drills one through the wall, drawing a sharp save from Martinez. While he's hardly been busy tonight, the Arsenal goalkeeper has remained alert throughout tonight's match.
This game looked to be petering out after Arsenal's second but Reading now have a chance to jolt it back into life having won a free kick right on the edge of the box...
No hat-trick for Oxlade-Chamberlain tonight; he will be replaced by Gedion Zelalem.
Moore is shown a yellow card for the most cynical challenge you will see all night on Giroud.
Arsenal finally have their second! Rob Holding embarks on a marauding run down the right, getting down the byline and knocking the ball into Giroud. With his back to goal, he instead opts to play the ball back to Oxlade-Chamberlain. He winds up his right boot and smashes a clean strike on goal that takes a deflection off Obita on it's way to finding the back of the net.
Goal! Arsenal 2-0 Reading (Alex Oxlade-Chamberlain, 78)
Al Habsi to the rescue again! This time it's Iwobi who tests his reaction, hitting a thunderout left footed strike from 20 yards out.
McClearly gets the first yellow of the game for a catching the trailing legs of Oxlade-Chamberlain.
Arsenal pass up the chance for a second! Oxlade-Chamberlain drives through, waiting for Giroud to make his move ahead of him. He eventually knocks the ball forward for the Frenchman who superbly lays it back into his teammate's path, teeing up the shot from the edge of the box. Once again, however, Al Habsi is equal to it and palms the ball way. Iwobi is onto the rebound but loses his footing and the ball runs out of play.
Lucas Perez isn't able to continue after that challenge from Gravenberch and his evening is over, with Chris Willock onto replace him.
Terrific stop from Al Habsi! The Frenchman meets the free kick with a powerful header but the Reading goalkeeper is equal to it. It sparks a melee in the Reading box with Oxlade-Chamberlain forcing the ball goalward, only for Moore to nod it clear.
Gravenberch's first contribution to this match is leaving a foot in on Perez following a foul down the right wing. The Spaniard gingerly gets to his feet and the Dutch defender is lucky not to get a booking for that.
Another Reading change now with Danzell Gravenberch coming on for Watson.
Here's Arsenal's first change of the evening with Reine-Adelaide off for Olivier Giroud.
That corner is cut back to Obita's whose ball into the box misses everyone and sails out for a throw in, via slight Arsenal deflection.
Reading keep coming here with McCleary winning a corner for his side.
Martinez denies Kermorgant! It's the first real save the Arsenal goalkeeper has had to make but he responds well to catch the Reading striker's header.
Reading make the first change of the game with Harriot being replaced by Jann Kermorgant.
Big let-off for Gibbs. The full-back hesitates chasing a ball back towards his own goal and it allows Harriot to race onto the loose ball. Gibbs catches up to him and makes a vital interception just as the Reading forward slides a ball across to a teammate.
Oxlade-Chamberlain denied a second! Perez lays the ball off for the onrushing Arsenal winger who tries to turn Blackett inside out, but the former Manchester United man sticks to his task well and deflects the ball wide for a corner.
And Arsenal get us back underway for the second half. No changes from either side yet.