Manchester City have banned their defender Ben Thatcher for six matches and fined him six weeks' wages for his challenge on Portsmouth's Pedro Mendes.
Mendes suffered a seizure after the challenge
The internal club punishment is separate from any Football Association sanctions over the incident, which left Mendes unconscious.
City said two matches of the six-game ban would be suspended.
Thatcher was left out of the weekend's Arsenal match, which means he will now sit out a further three games.
Those games will be the 11 September trip to Reading, and the away games at Blackburn on 17 September and Chesterfield three days later.
Manchester City chief executive Alistair Mackintosh said: "As custodians of the club, and football in general, the board and the manager felt it was important to act as soon as possible."
Thatcher, who has written to Mendes to apologise for the challenge, must answer an FA charge of serious foul play by 12 September.
Mendes has said he will not pursue a legal claim against Thatcher but the Portuguese midfielder did urge the FA to "make the right decision on his punishment".