Robert Pires has warned Arsenal fans they may not see the best of club-record signing Alexandre Lacazette for some time.
The France striker completed his move from Lyon earlier in the month for a fee believed to be worth as much as £52million.
That eclipses the money spent on Mesut Ozil in 2013 and will be seen as a statement of intent from manager Arsene Wenger that he is gunning for major silverware in the upcoming campaign.
Lacazette, who scored off the bench on his debut against Sydney last week, hit 28 goals in Ligue 1 last season.