Thankfully we recovered in the second half as goals from Pierre-Emerick Aubameyang and Alexandre Lacazette helped secure a vital 3-2 victory that sends us in to the worldwide break off the back of consecutive wins.
Yet it was ultimately an afternoon of success for Emery, who saw the Gunners' persistence rewarded with Lacazette's emphatic strike nine minutes from full-time.
Since arriving in January from Borussia Dortmund, the striker has scored 11 Premier League goals in 17 games.
Sunday's victory was notable for Emery and Arsenal as it was their first on the road this season and only their second in 2018 - which came at Huddersfield on the last day of the season.
Despite Cardiff's impressive display, Arsenal went ahead for the third time.
Cardiff scored their first Premier League goal of the season on their 41st attempt.
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Victory moves Arsenal up to ninth in the table after four games.
The Gunners created enough chances going forward to put the game away much sooner, with Lacazette hitting the post in the first half, but were also fortunate to concede a couple of more goals despite dominating possession.
In general, the Arsenal defence was at best frail, throughout.
Petr Cech is again expected to be deployed in goal, as Bernd Leno's wait for a start continues.
Opting to start with Danny Ward up top today alongside Bobby Reid and Junior Hoilett, Warnock was hoping that the 26-year-old could get on the scoresheet and get the Welsh club their first goal in this new Premier League campaign. On the stroke of half-time, however, the Bluebirds equalised courtesy of on-loan midfielder Victor Camarasa.
According to reports, Unai Emery has personally stood in the way of allowing Emile Smith-Rowe to be sent out on loan this season.