The gunners signed a new goalkeeper this summer but the manager has hint at making Petr Cech his first choice goalkeeper this season and so we expect Unai Emery to begin the Czech Republican worldwide in-goal against Manchester City.
There were some positive signs.
For Arsenal, their biggest concern will be at left-back with two specialist players in that position out for the fixture.
Guendouzi made a shocking error, taking an air shot at a bouncing ball, allowing Aguero to run through on goal.
Pierre-Emerick Aubameyang had a late goal ruled out for offside that summed up the Gabonese striker's afternoon.
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Although the competition hardly carries the weight of other trophies, it was an emphatic statement from City that they are ready to continue where they left off last season. But, he has failed to make a good first-impression, largely thanks to his wobbly form in the pre-season. Kyle Walker will overlap more for City than for England, where he was shifted inside into a back three.
Koscielny, now out with an ankle injury, captained the side in place of Per Mertesacker last season. The second goal came from a traditional Mendy overlapping run followed by a clever pull-ball to Silva, who smashed the ball into the top corner. Despite having much more players participating at the World Cup than Arsenal, Guardiola's City seems to be ready to challenge the Gunners on Sunday.
City's centre-back combination was also something of a step forward: only once, on the final day of last season, did Stones and Laporte start together.
The France striker injected more urgency into Arsenal's attacks and sent an effort just wide only moments after coming on. City, I think, after two years of working with Guardiola they have more stability, more security and when you watch City's matches, they are playing with a very, very great confidence in themselves.
Guardiola has suggested City can become even better this season, and on this evidence, it's hard to disagree.