Arsene Wenger said he would review Arsenal’s defeat in a “harsh way” as goals by Bournemouth’s Callum Wilson and Jordon Ibe dented the Gunners’ pursuit of a top-four place.
Wenger’s men are now without a win in five games in all competitions, and five points adrift of fourth place in the Premier League, after Bournemouth came from behind to extend their unbeaten run to four games and move further away from the bottom three.
Defender Hector Bellerin had given the visitors – playing without forward Alexis Sanchez – the lead when he latched on to a defence-splitting Alex Iwobi pass to squeeze the ball past Asmir Begovic.
But Wilson took advantage of Petr Cech’s indecision as he got to Ryan Fraser’s low cross before the Arsenal keeper and poked it past him.
The 25-year-old then turned provider, bringing down Lewis Cook’s cross for Ibe to rifle home.
“We were 1-0 up and suddenly we lost two goals and we don’t know where they came from,” said Wenger.
“It is very frustrating. Overall we have to look at it in a very objective and harsh way – we made mistakes we should not have made.
“The team that fights against relegation will fight and you cannot afford any concentration mistake.
“One-all was not good enough for us. We had to win the game. I think if you look again at the second goal we made many mistakes and that is what we paid for.”
Eddie Howe’s side savoured a first ever Premier League victory over Arsenal, at the seventh attempt, the victory moving them up to 13th place and four points away from danger.
But for Wenger, who was completing his three-game touchline ban for verbally abusing an official, it was further disappointment as speculation mounts that Sanchez’s departure is imminent.