Manuel Pellegrini insists he is not angry about reports that West Ham starting line-ups are being leaked.
The West Ham boss claims he is unfazed by Twitter account @ExWHUemployee, which it is claimed correctly predicted more than 60 Hammers starting teams.
The social media account has over 50,000 followers, who are often told the starting line-up well in advance of it being officially published by the club.
But Hammers manager Pellegrini believes it makes little difference if the public know his starting team ahead of time.
Asked if he is angry about the repeated leaks, Pellegrini replied: "No. First of all the news is not true, because I'm not angry about that.
"Normally in every team that I have managed, the day before the game, I work with set-pieces, so all the players know the day before who will play and who will not play.
"So, many players can talk with other players. I'm not keeping the starting XI until three or four hours before the game.
"There are a lot of ways or reasons why some people can know the team before it is released."
When quizzed on whether opponents stand to gain from the early information, Pellegrini continued: "I don't think that is the most important thing. Maybe if you're going to play against Chelsea, Watford, against Liverpool, you are sure that it will be the starting XI from the last game and they'll play exactly the same way.
"So I don't hide too much about the starting XI."
West Ham travel to Everton tomorrow still searching for their first Premier League points after four straight defeats.
Jack Wilshere is missing after injuring an ankle in training, while Javier Hernandez is ill.
"Jack felt a sprain in his ankle two days ago," said Pellegrini, of former Arsenal midfielder Wilshere. "He doesn't have a chance to play this weekend."