The Gunners parted company with Arsene Wenger after 22 seasons in the summer after Arsenal finished in sixth spot in the Premier League table last term.
The north London side appointed former Paris Saint-Germain and Sevilla manager Emery as Wenger’s replacement ahead of the new Premier League campaign.
Arsenal lost 2-0 to defending Premier League champions Manchester City in their season opener before a 3-2 defeat by London rivals Chelsea FC in their second fixture.
However, Emery’s side recorded their first Premier League victory of the new campaign last weekend thanks to a 3-1 win against West Ham at The Emirates.
Arsenal have the chance to record successive top flight victories when the Gunners make the trip to Wales to take on promoted side Cardiff City on Sunday.
Former Gunners star Keown has urged Arsenal persevere with Emery’s tactics.
“Arsenal gifted so many chances to West Ham,” Keown told the Daily Mail. “I agree with Arsenal playing a high line because it condenses the space for the opposition.
“But you have to play a high line with caution. As a defender, you have to be prepared to drop off if someone makes a good run.
“At the moment, none of the Arsenal defenders are seeing the runs or dropping off to deal with them.
“When I returned to Arsenal, the defensive instinct of the back four was so good that everyone was coming up at just the right moment.
“Steve Bould played in that defence. Arsenal have had a clear week and this is something they will have been working on.
“Saturday was a timely win that will have have done the team’s confidence the world of good. But it is vital they persevere with what Emery wants to do.”
Emery recruited experienced Switzerland international Stephan Lichtsteiner in a free transfer from Serie A giants Juventus.
The Gunners have also brought in Bayer Leverkusen goalkeeper Bernd Leno in a £20m deal.
The north London outfit have also brought on Greece international Sokratis Papastathopoulos from Borussia Dortmund earlier this month.
Lucas Torreira became the fourth addition at The Emirates last week before Lorient teenager Matteo Guendouzi finalised a move.
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