Down to ten men
There are 11 players on a football team and if one of these players is sent off or injured then you might hear the phrase ‘down to ten men‘ being used. This might be for a short period of time if a player is injured and the team is waiting for the substitute to come on to the pitch or it might be longer and more permanent as a player has been sent off. In the recent Confederations Cup group match between Germany and Cameroon the African champions went down to ten men in the second half and eventually lost the game 3-1. Down to ten men.
Example: Crystal Palace boss Allardyce felt Manchester City should have been down to ten men in the second half (Croydon Examiner: Jan 28th 2017)