"I told him the decision I took, and I told the other captains".
Arsenal's disappointing start to the season continued this afternoon, with Vitoria Guimaraes scoring a late equaliser in their Europa League group stage game in Portugal.
The 27-year-old has since issued an apology of sorts, explaining that ongoing social media abuse aimed at his family also led to his furious reaction.
The Swiss midfielder erupted in the 61st minute of his side's recent 2-2 draw with Crystal Palace after being booed by fans upon his substitution.
Unai Emery remained defiant when asked about the possibility of being replaced by Jose Mourinho after seeing his Arsenal side let a lead slip for the fourth game in a row as they were pegged back by Vitoria.
Arsenal, who play at Leicester in the Premier League on Saturday, have also rested defenders David Luiz and Calum Chambers. "Now we need to be focused for tomorrow", said Emery about his decision. "At the end of the day, we need to stay calm, play our football, believe in ourselves and then in the final third try and do it a little more intelligently, with a little more accuracy in our final pass".
"In the Europa League it's about being first in the group and at the moment we are".
"I needed to take one decision, and now it is closed", Emery added.
Lacazette will make way for youngster Gabriel Martinell who will play up front as the lone striker while Aubameyang makes way for Bukayo Saka on the left-wing.
Emery is likely to return to a two-man midfield pivot for Wednesday's game, with Lucas Torreira featuring once again from kick-off. Emiliano Martinez comes into the team in place of number one Bernd Leno, with Sokratis, Rob Holding and Shkodran Mustafi playing in a back three.