The German Felix Zwayer is the referee designated to referee the Napoli-Barcelona match on Wednesday evening. The match is valid as the first leg of the Champions League round of 16.

The Dutchman Serdar Gozubuyuk was chosen as referee for the other match, Porto-Arsenal, which will be played on Wednesday. The fourth official Sven Jablonski and the Var and Avar Bastian Dankert and Soren Storks are also German.