The severity of Danny Welbeck's ankle injury will feel more unkind as he is out of contract in just seven months' time.
But it was Welbeck's injury just before the half hour mark that was the main talking point from a largely forgettable Emirates Stadium encounter.
He was given the task of leading the front line, with Alex Iwobi and Henrikh Mkhitaryan playing supporting roles behind him, as Emery rested in-form strikers Alexandre Lacazette and Pierre-Emerick Aubameyang.
Meanwhile, fellow Arsenal star Ozil tweeted his support to the England global.
"The worst news tonight is these injuries", the Spaniard told a media conference.More news: Deaths feared as wildfire engulfs North California town
"His injury was hard for the mentality of the players because they looked at the injury".
BT Sport did not show replays of the incident due to the nature of the challenge and injury.
"Now he's at the hospital and the news is at the moment we are going to wait, but we think this is a serious injury".
But a 15th game unbeaten for Unai Emery's side at least assured them of European football after the turn of the year with two group matches left to seal top spot.More news: DR Congo Ebola outbreak reaches 300 cases
Rob Holding: "I didn't see it because obviously I'm at the other end of the pitch so I didn't see exactly what he'd done".
"Danny is a tough lad, so if he's on the floor, I know it's something serious". A good lad and a good friend.
"The best for him is now to think for the person", Emery said.
"Injury to #Welbeck. Possible fracture dislocation of ankle which could [be] career ending", Wilson wrote on Twitter.More news: Dead brothel owner Dennis Hof wins election in Nevada, U.S.