A player dropping out of the warm-up before a game is something Mikel Arteta has had to get used to this season.
When Riccardo Calafiori pulled out before Arsenal's game with Wigan on Sunday, it was the third time in this campaign that this had happened to the Gunners before a match.
But on this occasion, Arteta gave a glimpse of what could be the next evolution of the Arsenal attack - Bukayo Saka playing as a number 10.
When Calafiori and Saka had to pull out of games against Brighton and Leeds earlier this season, Arteta made straight swaps for players in their positions but for this match he shuffled his players around.