Arsenal are likely to be without Kieran Gibbs for three weeks after the defender picked up a thigh injury against Liverpool.
The 23-year-old limped off during the 2-2 draw on Wednesday evening and has been ruled out of the Premier League matches against Stoke and Sunderland, while he could also miss the Champions League tie against Bayern Munich.
"Of course it's a blow for us," said Gunners boss Arsene Wenger.
"He is important for us going forward and the game we want to play."
I believe the quality is there and we have to trust it and forget what happened in the past.Arsene Wenger
Wenger admitted the manner in which his side conceded two goals against Liverpool caused him concern, but insists his side are capable of mounting a challenge for the Champions League places. They are 2.25 to finish in the top four, while Spurs, who drew against Norwich, are 2.10. Everton, who defeated West Brom, can be backed at 4.50.
"I believe recent history has an impact on the way we started the game," said Wenger.
"I believe we have to get that out of our minds and focus on playing football and what we want to do to the opposition.
"I believe the quality is there and we have to trust it and forget what happened in the past. What happened in the past, you could see it played in our heads at the start of the game."
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