Arsenal will face Vitoria de Guimaraes on Wednesday evening, instead of the more traditional Thursday night fixtures that the UEFA Europa League has been accustomed to.
Arsenal currently have three wins out of three in the Europa League, and have recently beaten Vitoria de Guimaraes at that Emirates after a late comeback that was inspired by Nicolas Pepe's two outstanding free-kicks.
Instead of on Thursday, Arsenal and the Portuguese side will play on Wednesday at 4.50pm (GMT+1), a decision that was made as early as September by UEFA.
According to UEFA, the game has to take place a day before due to The Estádio D. Afonso Henriques being just 15 miles away from local rivals' S.C. Braga's stadium.
Braga are also competing in the Europa League, and they will be hosting Besiktas on Thursday, meaning that UEFA's rule of not allowing two teams that are in the same region to play on the same night comes to play, thus reducing the strain on the local police force.
However, the game is going to be played so early due to the Champions League games that are set to be played on Wednesday, in order to avoid any clashes in TV rights.