Arsenal defeat to Bournemouth because they lost in the first leg of the UCL, Arteta had to sacrifice the EPL match to maintain the fitness of the players in the UCL. Literally, the defeat had a big impact on their morale, but on the other hand, they were very motivated to win the second leg of the UCL. Arsenal need just a few more points to secure a place in next season's Champions League, but if they win the trophy they will qualify automatically even if they finish outside the top five.
I don't think Arsenal was defeated due to the first leg of the Champions League they lost against PSG. If Arsenal didn't want to put effort into the game against Bournemouth, I am confident they weren't going to start with their first XI. I checked Arsenal squad when they were playing against Bournemouth, and I discovered that every player they were going to use in the Champions League started the match, except Timber, who wasn't available in the Premier League game. Arsenal only lost because they did not perform well enough to get a point.
Actually i think @ reagansimms May be right when he said that Arsenal was defeated due to their lost against PSG in the UEFA champions league, because i feel that the champions league match is more important for arteta than any other match even for the players as well so losing their first leg was something they never thought nor imagine that it will happen i think that
's what brings could be the
reason of the sudden change of performance against bournemouth, this was exactly what liverpool went through after PSG got them eliminated in the UEFA champions league and this same PSG also got Aston villa eliminated.........and now they're about to eliminate arsenal as well, as it stands there's no much hope for arsenal because they have one leg in and the other leg out, I just wish they make it in this thier returning leg.