Arsenal remain hopeful Mohamed Elneny will return to action this season despite confirming the midfielder sustained ankle ligament damage on Monday (NZST).
Arsenal travels to Old Trafford to take on Manchester United in a Premier League blockbuster LIVE on beIN SPORTS this week.
Arsenal manager Arsene Wenger admits he will use Monday's (NZST) clash with West Ham to prepare for the "absolutely vital" meeting with Atletico Madrid in the UEFA Europa League semi-finals.
Atletico Madrid boss Diego Simeone says he is learning more than ever this season and expects another examination of his managerial abilities from Arsene Wenger in the UEFA Europa League.
Arsenal will host Atleti in the first leg of their glamour UEFA Europa League semi-final match-up.
Diego Costa and Lucas Hernandez were injured as Atletico Madrid booked a place in the semi-finals of the UEFA Europa League.
Arsenal reached the last four of the UEFA Europa League as it scored twice late on to snatch a 2-2 second-leg draw against CSKA Moscow.
Former France international Patrice Evra was sent off before the start of Marseille's UEFA Europa League match with Vitoria Guimares after clashing with fans.