The 30-year-old centre-back is now a major doubt for the UEFA Champions League trip to Group E leaders PSV Eindhoven on 24 November, where Arsenal will want a result to boost their European challenge, as well as England's friendly against Spain on 17 November.
Campbell's absence has been felt in Arsenal's last two matches. The English champions were held 1-1 at home by Panathinaikos FC last night, following a 2-2 Premiership draw with Southampton FC, also at Highbury, on Saturday.
Manager Arsène Wenger is not unduly concerned, however, saying: "I cannot accuse the team of giving chances away or not being concerned by our defensive side [against Panathinaikos] - we wanted well to defend and we did it quite well." Arsenal, who have gone three games without a win, are next in action at Premiership newcomers Crystal Palace FC on Saturday.
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