The 24-year-old found the net for an impressive streak of nine consecutive games earlier in the campaign, but lost his magic touch as the Gunners bid for Barclays Premier League and European glory faded.
"Emmanuel took his tally to 30 for the season with a hat-trick at Derby, but there is some room for him to improve - and that makes me very positive," said the Arsenal manager. "I believe he has to keep a good working attitude."
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