A football fan was arrested after a banana skin was thrown onto the pitch at the Emirates Stadium as Arsenal forward Pierre-Emerick Aubameyang celebrated scoring a penalty in front of Tottenham fans.
The Gunners won a memorable match 4-2 and London's Metropolitan Police afterwards confirmed there were seven arrests made. One of those arrests came after a banana skin was hurled from the away end as Aubameyang celebrated scoring in front of Tottenham fans.
Spurs slammed the behavior as "completely unacceptable" and promised to ban the supporter.
There were also six arrests for public order offenses - at least two of which are believed to be Arsenal supporters who lit smoke canisters during the match.
Former Arsenal and England forward Ian Wright said: "I've played against Spurs and I've taken a lot of abuse from Spurs but never ever has it been racial. Now Spurs have to deal with this.
"It's not only embarrassed Spurs but it has embarrassed the Premier League because it has gone around the world, and now Spurs have to deal with that and have that tainting all over them. It's really unfortunate to see."
Aubameyang opened the scoring with his 10th-minute spot-kick and, after Tottenham had replied through Eric Dier and a Harry Kane penalty, equalized early in the second half.
Alexandre Lacazette put the hosts 3-2 up before Lucas Torreira added Arsenal's fourth.
The unrest was not restricted to the stands as the two sets of players had to be separated following Dier's equalizer. The England midfielder celebrated by putting his finger to his lips, with Arsenal substitute Stephan Lichtsteiner reacting angrily to the gesture and referee Mike Dean showing Dier a yellow card.