Arsenal have found the additional attacking option they wanted in Leandro Trossard, but the Belgian's arrival from Brighton isn't likely to have gone down well with every Gunners star.
Trossard's ability to play in several positions in the attack will serve him well as he becomes the newest addition to Mikel Arteta's Premier League title chasers, but it will also have a knock-on effect on the players already there.
Suddenly some will be less certain of their places in the team, while others may even be eyeing the Emirates exit door in the summer.