Arsenal boss Mikel Arteta has confirmed Leandro Trossard missed Sunday's draw with Tottenham due to injury.
The Belgian has been one of the form players for the Gunners this season, but was absent for the 2-2 draw.
Arteta has since stated Trossard was absent due to a knock.
"He felt something, a muscle tightness in training and he wasn't up for playing the game," said the manager.
Arsenal meet Brentford on Wednesday night in the Carabao Cup.