Arsenal will be without star defender William Saliba for Wednesday's trip to Brighton due to injury. The Frenchman was left out of the squad for the trip to the Amex Stadium. A statement from Arsenal confirmed that his absence was due to an 'issue' picked up in the win against Chelsea. Cristhian Mosquera has been named in the starting XI in Saliba's place and slots in alongside Gabriel Magalhaes. Saliba, 24, has been a key player for Arsenal this season, having made 34 appearances in all