The Gunners splashed out a club-record £72million to sign the Ivorian forward from Lille in the summer, but he has so far struggled to make an impact.
The 24-year-old hit 22 goals for Lille last season to earn a move to north London and has himself admitted he has found it tough to adapt to English football so far.
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“It has not been easy,” he told French radio station RMC after again flattering to deceive in Monday’s 1-1 draw at Manchester United.
“My confidence must come back. I am not very worried. People may be worried about my statistics but I am not.
“I have to keep working as the level here is different – it is a new league for me and I must adapt quickly. But it won’t take very long.”
Emery may yet decide to start Pepe in Thursday’s Europa League Group F clash at home to Standard Liege in an attempt to play one of his star men into a run of form.
The Spaniard insists there is no concern that the fee Arsenal paid for Pepe is weighing him down – having seen him hit just one goal so far, a penalty in a 3-2 win over Aston Villa.