Manchester City boss Manuel Pellegrini has described Jose Mourinho's style of football as "selfish."
In "The Pellegrini Method," a book about the coach published in Chile this week, he says he does not think that Mourinho's Chelsea team are boring but suggests he is more interested in results over attractive football.
City have been the Premier League's leading goal scorers in both seasons under Pellegrini's management, scoring 10 more goals than champions Chelsea last season, and top the scoring charts so far this campaign.
Mourinho and Pellegrini have a long-standing rivalry from their time in La Liga, which has carried through to the Premier League. Mourinho even suggested that City should be docked points for breaching financial fair play regulations earlier this year.
"It used to be said that Mourinho's Chelsea were boring. I don't think that's true at all. Chelsea are selfish not boring," Pellegrini said, as reported in the Independent. "It's a team that puts a lot of emphasis on what they do without the ball. And in my opinion that concept of football doesn't respect the spectacle of the game.
"There are millions of people watching, [some] paying very high prices for tickets. You are seeing great players defending instead of trying to attack the opposition's goal.
"It is a valid [way of playing] and if you win the league then it is even more valuable but it bears no relation to the spectacle. That is why I believe they are a selfish team, the only thing they want is to win."
He added: "Yes, the fan wants to win for sure. But it is different if you do so by playing well. That is where I differ. I am not a critic, I just believe in a different way of getting the result. What I am critical of is people who are willing to do anything to win.
"What never changes is how competitive he makes his teams regardless of the players he has.
"Mourinho brings an awful lot to the show that surrounds football. He is in constant conflict, willing to go down a level if they are attacking him with a particular question and sometimes coming out with a brutal answer."
Pellegrini also did not try and pretend the pair are friends. "We do not have each other's telephone numbers, neither are we going to invite each other round for dinner but we are not enemies," he said.