Arsene Wenger was left to wait and see what would be regarding three of his most important Arsenal players.
Star attacker Alexis Sanchez, central defender Laurent Koscielny and midfielder Santi Cazorla all finished Sunday's 1-1 draw with Norwich City injured but the extent of the damage to all three is known as yet.
Sanchez clutched the hamstring that troubled him late in the Dinamo Zagreb clash midweek, Koscielny had to be subbed off early with a hip problems while Cazorla completed the 90 minutes at Carrow Road but was hobbling after receiving an earlier knock on his knee.
Of the trio, Wenger said: "We have three because Cazorla played on one leg for the final part of the second half. He has a knee problem, Sanchez has a hamstring injury and Koscielny has a hip problem.
"How bad it is I do not know, we will have to see in the morning."
Arsenal took the lead on the half-hour mark when Mesut Ozil slotted home a pass from Sanchez before Lewis Grabban marked his first start since opening day by getting the better of Gabriel and finishing comfortably beyond Petr Cech.