Emile Smith Rowe appeared to suffer an injury during Arsenal's post-match warm-down at Old Trafford, as the Gunners were beaten 3-1 by Manchester United on Sunday.
New Red Devils signing Antony stunned Arsenal with a debut goal in the first-half before Marcus Rashford struck twice in the second to fire United back ahead following Bukayo Saka's 60th-minute equaliser.
As Mikel Arteta's side hunted a pathway back into the contest, Smith Rowe was called upon to replace playmaker Martin Odegaard, making his fourth substitute appearance of the season.
And it seems the league leaders' trip to Manchester went from bad to worse during the warm-down, as their attacking midfielder looked to pull up with an injury.