Eddie Howe has cautioned against overreacting to the three-game losing streak that has stalled Bournemouth's early season momentum.
Jefferson Lerma's remarkable own goal put them on the back foot and they were left with a third successive 2-1 loss after Pierre-Emerick Aubameyang responded to Joshua King's equaliser.
"It's important the confidence levels aren't affected by those defeats," Howe said.
"We took Manchester United to the limit and gave everything and came away beaten.
"Losing to Newcastle was disappointing as well, but we've had a very strong start to the season so it's important we don't overreact in these moments.
"We know we will win again soon. We don't overreact whether we win or lose."
7 - Since being promoted to the Premier League ahead of the 2015-16 season, only Swansea (12) have scored more own goals in the competition than Bournemouth (7). Misfortune. #BOUARS— OptaJoe (@OptaJoe) November 25, 2018
Colombia international Lerma, the club's record signing, endured a particularly frustrating outing at the Vitality Stadium, volleying past his own goalkeeper in the 30th minute and hitting the post with a late attempt to make amends.
Howe felt the midfielder's misfortune was indictive of the way events fell in Arsenal's favour.
"Their first goal was bizarre but that's the luck that was against us," he added.
"There was nothing Lerma could do about it and he was inches away from being a hero at the end. That's football for you."