Chelsea will play against Slavia Prague in the Europa League on April 11th. Ahead of the game, Chelsea official website published the details for the upcoming games but made a mistake by naming Sparta Prague instead of Slavia Prague.
And after the incident, Sparta Prague's official twitter account took a cheeky dig at Chelsea, by posting a tweet with a caption: "Hi guys Chelsea, we completely understand you are confused, since we are the most famous and most succesful club from Prague. But this time you play against Slavia, sorry...:("
Chelsea have since corrected the mistake on their website.
https://twitter.com/ACSparta_EN/status/1112942680441569280