Arsenal manager Mikel Arteta looked into the eyes of his captain Pierre-Emerick Aubameyang and knew the star striker had to go.
'That level of trust was gone,' the young coach tells the next instalment of the fly-on-the-wall documentary, All or Nothing Arsenal.
'It was a really difficult decision to make, in the middle of the season, and with the most important player of the club and the impact not having that player could have on the performance of the team.
'But if you put all these ingredients together and still the decision is clear, then you have to make it.