The London Stadium fixture was marred by clashes between supporters in the closing stages, with the police making seven arrests as a result.
However, a flyer aiming to incite homophobic chanting at Chelsea captain John Terry, which spread widely on social media, will also form part of an investigation into the scenes.
A Metropolitan Police statement read: "Police are aware of a leaflet handed out before the match containing homophobic contents. This will form part of the post-match investigation."
