Arsenal are set to be without striker Nicklas Bendtner for the next four weeks, after he suffered a groin problem in the North London derby on Saturday. The Dane, who has scored three goals so far this season, lasted just 37 minutes of the 3-0 victory over Tottenham before being replaced by Eduardo. After the game Arsene Wenger revealed the extent of the injury, saying: "He's got a groin problem, it's quite serious and he could be out four weeks at least." The injury means Bendtner will miss the Champions League games against AZ Alkmaar and Standard Liege, as well as sitting out the Premier League encounters with Wolves, Sunderland and Chelsea. Meanwhile, Saturday’s win over their rivals moves the Gunners up to third in the Premier League table – five points behind leaders Chelsea.