Defender Eric Dier's free-kick beat Leno but crashed against the bar, and Leverkusen captain Toprak beat a flat-footed Vincent Janssen to the rebound.
"It's a big home game for us and we have an opportunity to show we have an interesting role to play in this Premier League".
"The Arsenal fans are unbelievable supporters and that really helps me to perform well and want to give them something to celebrate".
"We can make a lot of excuses, but tell me one place better than here to play football".
"We are very disappointed and we can not show the performance that we have in recent weeks - that is the problem".
Their loss to Bayer Leverkusen in the Champions League this week has only compounded their problems this season and they are suddenly looking a bit away from repeating their effort from the previous season.
Spurs were well below par at the national stadium and Bayer Leverkusen took full advantage, claiming a 1-0 victory thanks to Kevin Kampl's second-half victor. "We're in a hard moment but, to be honest, I like to have that kind of moment to learn and improve and it doesn't scare me".
Usually it is Arsenal that dread November, but ahead of Sunday's north London derby, Spurs goalkeeper Hugo Lloris has admitted that Tottenham could not be in a "worse situation".
Lloris, however, insists Spurs cannot rely on any magic fix. This has left the manager with no quality options to replace first team players and that has surely affected their chances this season.
There were even some players on Spurs' side that didn't know Arsenal had just won the title, as Henry would confirm years later. For us it will be very good news that he will be back.
Erik Lamela is also facing a late fitness test on a hip injury that kept him out of the Leverkusen game but Ben Davies has been ruled out and will miss the game along with Moussa Sissoko - who serves the final of his three-game domestic ban.
"Hopefully, with the buys Arsene has made, they've got that toughness now and they can have a real go - not just in the Premier League but in Europe because what I would love, more than anything, is to see Arsenal win the Champions League".
The England worldwide could play some part in Sunday's derby at Arsenal when Tottenham, without a win in six, will attempt to extend a four-game unbeaten league run against the Gunners.
"It's always important to play the derby".
Sanchez, who has performed in five derbies since his 2014 switch from Barcelona, believes that he and his teammates need to play "wisely".
"It is an interesting clash because for us it is a very important game because we are in a strong position in the league that we want to strengthen", Wenger said ahead of the game.
"We need to improve and change some things".