That win Villa had against Man-City was a big boast for Villa's momentum against Arsenal and the early goal Aston villa got around 7mins in the game gave them a bigger moral to excellently hold arsenal to a stand still that despite how clinical arsenal were in the second half they still couldn't get a goal except for the the goal scored by harvertz but was disallowed by VAR as a hand-ball. Arsenal were quite unlucky in today's game, in football there are good and bad days, today should be taken as one of those bad day for arsenal, not even a draw was at hand.
Gadrdiola will definitely be in his worse mood now, seeing his reaction when an opponent gets a goal against him is enough to tell how unpleased he will be with the results he got by the end of the match, against a team they will consider to be weak , sadly this team won them flawlessly in a 3-0 victory such that they were unable to get a goal.
Indeed it was a boost to villa as their confidence was above regular and they were able to face the gunners head on and came out victorious, they knew that the Early goal was luck turning out on their side so they had to defend it because they were aswell aware that if the gunners gets an equalizer then definitely they may loss the game but then if they are able to defend their only goal and probably get another then they will win which was basically their mentally in the second half