Full-time: Everton 0-2 Arsenal
- Welbeck opens the scoring after eye-catching team move.
- Iwobi adds a second shortly before half-time.
Full-time: Everton 0-2 Arsenal
So, Arsenal bounce back from their European setback with an impressive showing against the Toffees.
Welbeck and Iwobi - who was man of the match - scored the goals in the first half, and the Gunners thoroughly deserved their victory.
Lukaku heads Funes Mori's ball down and on target. His effort is greeted with ironic cheers.
Everton stand on the cusp of their eighth home defeat of the season. There are five added minutes, by the way - not that it'll make much difference to the result.
Another switch for the Gunners - Iwobi makes way from Chambers.
An excellent performance for the youngster, though. He has given some of Arsenal's more established players something to think about with that showing.
Giroud has the ball in the net - but it is ruled out for a foul.
Again, that decision appears generous judging by the replay. Arsenal should be over the hill and out of sight by now.
Giroud goes down in the box, but again, nothing doing for the Gunners.
That should have been a penalty. Everton have gotten away with a couple of those decisions today, which serves to underline Arsenal's dominance.
Anyway, less than ten minutes left at Goodison - can the Blues launch an unlikely comeback?
Hector Bellerin has been another impressive performer for the Gunners.
He has emerged as one of their key players in recent months.
A much-needed change for Everton. Ross Barkley, who's barely had a kick this afternoon, makes way. Deulofeu comes on in his place.
Meanwhile, Arsenal - who, remember, played in Barcelona in midweek - decide to make a change, also.
Olivier Giroud comes on for Danny Welbeck, and Gibbs comes on for Ozil, who took a knock a few minutes ago.
There is no concussion, and Ospina appears able to continue for the time being. We've played nearly 70 minutes at Goodison and it's as you were.
Wait, Arsene Wenger is involved in conversation with the medics - a change might be about to take place. He's limping around his area at the moment.
At last! Some signs of life from Everton!
Seamus Coleman goes flying up the right side, he crosses the ball to Lukaku but Ospina gets there just before him.
Ospina has taken a nasty bang there, too.
There's a lack of movement from Everton at the moment. In truth, they don't look like they believe they can get back into this game.
Roberto Martinez needs to make a sub or make a tactical switch. Nothing is working for the Toffees at the moment.
There are more goals in this for Arsenal if they can find the right pass in the final third.
There is a very tangible air of frustration around Goodison Park, where the home supporters have had little to cheer.
Iwobi looks like such a good young player, I can't emphasise that enough.
The 19-year-old midfielder has been one of the better players for the Gunners so far. He looks so strong and composed on the ball.
It would take a monumental effort from Everton to rescue anything from this game. The hosts were booed off at half-time - they need to give the Bluenoses something to cheer.
Right, we're back underway at Goodison. Everton have made one change.
The Toffees were light-years away from Arsenal in the first half.
Half-time: Everton 0-2 Arsenal
The Gunners have been sensational and it could easily have been more. Welbeck, Iwobi, Sanchez and Ozil have been thrilling going forward.
Another eye-catching move involving Welbeck and Iwobi ends with the youngster just missing the near post with his powerful shot.
Arsenal have been absolutely brilliant in the final third. The Everton defenders' heads must be spinning at the moment.
GOAL: Everton 0-2 Arsenal (Iwobi)
A lightening counter-attack from the Gunners ends with Alex Iwobi racing through on goal and calmly slotting the ball home.
It's 2-0 - and no less than Arsenal deserve. That's the 19-year-old star's first goal in the Premier League. He looks like a real gem.
Five minutes to go until the break, now. After their fast start, Everton have barely posed a threat to the Arsenal goal.
They need to get Lukaku in the game more often, without wishing to state the obvious.
Arsenal appeal for a penalty, as Sanchez goes down under a heavy tackle. The Chilean is furious with the ref.
That was a penalty, I think, but Sanchez - for some reason - delayed his fall to the ground, which probably swayed the ref's decision. Everton survive another scare.
Arsenal continue to dominate at Goodison.
When you watch the Gunners pop the ball around as they have done in the first half, you wonder how they can play so poorly at times.
Iwobi has been one of the stars of the show, by the way.
Arsenal are certainly more fluid with Welbeck upfront instead of Giroud.
The one criticism of the former Manchester Unite striker has been his lack of goals. However, he is starting to find the net with some frequency these days, meaning Giroud has to make do with a place on the bench.
Welbeck's recent form is sure to have pleased England boss Roy Hodgson, too.
A little bit of encouragement for Everton, here. Besic takes a well-directed shot from distance, but Opsina manages to scramble across to his left to save.
That was much better for the hosts, though, who have been camped inside their own half for the last 15 minutes or so.
Welbeck, Iwobi and Alexis are constantly interchanging for the Gunners. They are playing some terrific football and look like they could score with every attack.
We wondered how they might respond to their midweek Champions League exit... well, they have been very good so far this afternoon.
The game appears to have finally settled into a more sedate rhythm, after that frenetic start.
Arsenal are dominating the ball for the most part, looking to find gaps in the Everton defence. The hosts, on the other hand, are seeking to make fast counter-attacks and take advantage of the risks the Gunners take in defence.
Anyway, we've played 20 minutes at Goodison, and it is so far, so good for Arsene Wenger...