Football Manager 21 game director Miles Jacobson said the segment was the fastest to hit the million-sold mark.
In addition, more than 900,000 people played the game last week.
Football Manager 21 was the first game in the series to hit the Xbox. Perhaps it was thanks to the Xbox One and Xbox Series that the record was set.
The title is available on PC, Xbox One, Xbox Series, Nintendo Switch and mobile devices. No simulator is provided on PlayStation consoles.