Brentford and Liverpool are separated by just one point in the Premier League table ahead of Saturday's 14:00 kick-off at Brentford Community Stadium.
The Arsenal manager says reducing up to 60 roles is necessary to keep the club moving forward, but the timing alongside his own new contract has drawn scrutiny.
Second-half goals from Timber, Eze and Saka swept Arsenal past a stubborn Lille side who had kept them at bay for an hour.
