The Gunners are currently two points ahead of Spurs in the Premier League after five matches.
As well as welcoming Tottenham to the Emirates on Saturday, Arsenal will host Galatasaray in the Champions League group phase on Wednesday before taking on Chelsea at Stamford Bridge four days later.
"I only have my eye on the next game because it's a massive one but it's true we have an important week," Wenger said in this morning's press conference.
"North London derbies are always very intense and the players from both sides know each other so well. Our start has been decent, but we enter the second block of games now which will be crucial."
The Gunners are yet to lose a game in the league following two victories and three draws.