Arsenal need to lick their wounds after a disappointing display versus Bournemouth on Saturday evening.

The red card picked up by William Saliba did have a big impact on the result but, as manager Mikel Arteta said after the game, the defeat was self-inflicted.

Two mistakes (one from Leandro Trossard and another from Jakub Kiwior) essentially decided the match. You can’t afford such errors at the highest level.

Press the next page as we list five lessons we learned from the defeat to the Cherries.