Fifa president Sepp Blatter has told Sir Alex Ferguson and Sven-Goran Eriksson they must clamp down on Wayne Rooney’s disciplinary indiscretions.

Manchester United and England striker Rooney was sent off in Europe for United last month and banned for England’s game against Austria.

“When you play at the level he plays he should be called to order,” Blatter said.

“I wouldn’t say that you should have to beat him.”

Asked whether his manager should be tougher on him, Blatter told Radio Five Live: “Definitely, and to tell him, ‘you are so talented but keep the right way, otherwise it is not good for the game.’ He has such a career.

“He can go for 15 years but [you must have] self-discipline and respect for the others.”

Blatter also hinted the seedings for the 2006 World Cup finals will be based purely on world rankings.

The system previously used by Fifa takes into account the average world rankings during the past three years as well as performances at the past three World Cups.

In addition, Blatter expressed his concern about wealthy clubs buying up the world’s top players only to leave many of them on the bench.

Blatter said: “We should intervene here. A club should not have more than a certain number of players in their professional squad.

“And on the field of play they should have at least six players eligible for the national team of the country where the club is playing.”

The Fifa chief also noted that several clubs were no longer fielding their best line-ups when facing the stronger clubs, because they felt they had no chance of winning the games.

“I had the opportunity to speak to an official from West Bromwich,” said Blatter.

“He told me a story which is an extravagant story by saying that his club, all the clubs, when they are meeting Chelsea or Arsenal or Liverpool or Manchester (United), they will not field the best team because they know they are going to lose. This is not correct.”