Arsenal boss Arsene Wenger is concerned over his side’s tactics, with the belief that his team are not threatening enough from set pieces, as reported by the Daily Star.

Despite having a huge 15 corners against north London rivals Tottenham Hotspur on Saturday, Wenger’s side did not convert from any of them, which has caused the French manager consternation.

In fact, Arsenal have failed to score from a single corner since the start of the new season, which Wenger is not particularly happy about.

Wenger said: “It’s a concern. We have lots of room for improvement and we need to do that quickly.

Saturday’s game saw Arsenal go behind against their fierce rivals, with Nacer Chadli bagging to put the White Hart Lane side into the lead.

However, a late equaliser from Alex Oxlade Chamberlain levelled things up at 1-1, and despite pressure from Arsenal, the game finished as a draw.

Wenger now leads his side into an exceptionally difficult game against Chelsea, who have not yet lost this season.

Arsenal manager Arsene Wenger has suggested that his side could still yet make signings, on the assumption that the injuries that his team have suffered turn out to be worse than the club expects them to be, as reported by the Daily Star.

Wenger has seen his side start the new season in somewhat decent form, but Tuesday night’s clash against Borussia Dortmund spoke for some realities surrounding his squad. Depleted by the injury to Mathieu Debuchy, a makeshift back line offered little in the way of resistance to Dortmund’s formidable attacking line, and the north London club slumped to a 2-0 loss.

With Debuchy injured, Arsenal had to turn to youngster Hector Bellerin to fill in at right back. While Bellerin was not particularly to blame for the loss, injuries elsewhere make the club’s options look increasingly poor, and many expect them to look into the free transfer market to aid the squad.

It is not as simple as that, according to Wenger, who said: “You cannot rule anything out because it depends on how long the injuries are and how many you have.

“At the moment, we are not in that need.”