The 32-year-old believes his side can catch up with current league leaders Liverpool to challenge for silverware this term
Arsenal defender David Luiz is confident his side can challenge for the Premier League title this season.
The Gunners have not lifted the English crown since 2004 and have finished outside the Premier League's top four in each of the last three seasons.
Unai Emery's team are third in the table after eight games and sit nine points behind leaders Liverpool, who have a perfect record.
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The north London side may have struggled to compete for the big prize over the last 15 years, but their Brazilian centre-back believes they must have faith that they can narrow the gap before the campaign is over.