What happens when a player gets injured and no more substitions?

Question

In soccer, what happens when a team is out of subsitions and a player gets injured? Do they play with an injured player or do they get to sub the player ?

Answer 1

Both answers above are correct.

Answer 2

They either play with the injured player or play with 10 men

Answer 3

they would keep him playing or would play with 10 men using a different formation

Answer 4

They either tell him to put on his brave face and carry on playing, or finish the game with 10 players