Unai Emery has condemned the Tottenham fan who threw a banana skin at Pierre-Emerick Aubameyang in the north London derby.
A man was arrested for throwing the object at the striker; Metropolitan Police officers are investigating whether the incident was racially aggravated.
Yet images of Aubameyang celebrating in front of Tottenham fans with a banana skin at his feet provides a throwback to the darker days of English football.
The Football Association are also investigating the controversial flashpoint, they will speak to representatives from both clubs, while images and CCTV footage are likely to prove crucial.