Sunderland boss Roy Keane has disciplined the trio caught on a night out less than 48 hours before the 5-0 defeat at Chelsea.
El-Hadji-Diouf, Djibril Cisse and Pascal Chimbonda are all understood to have been fined after a club investigation and meeting with Keane, says the Daily Mail.
Keane said: "We hope players behave in a certain way they have had a fair hearing and its has been dealt with."