Benitez was disappointed that an arbitration panel on Tuesday ruled that a signed letter did not oblige Manchester United to sell Gabriel Heinze to Liverpool for £6.8 million. The Argentine defender is now likely to join Real Madrid after they agreed a fee last night with Manchester United believed to be £8.1 million.
"I would like to ask the Premier League a number of questions," said Benitez. "How can a player with a signed agreement be treated like this? He has a document which is clear, but the Premier League prefers to believe the word of someone else who made a mistake.
''I know there were accusations made against Liverpool in the hearing, which were unbelievable. How can this be allowed?
''Then I want to ask the Premier League why it was so difficult for Liverpool to sign Javier Mascherano, when we had to wait a long time for the paperwork, but it was so easy for Carlos Tevez to join Manchester United?"
Argentina midfielder Mascherano joined Liverpool from West Ham in the January transfer window and the deal took weeks to clear as the row over third-party ownership of players at Upton Park raged on. The Tevez move from West Ham to United took less time to approve.
Benitez also broadened his complaint to the fixture schedule.
"I would like to ask the Premier League why is it that Liverpool always play the most fixtures away from home in an early kick-off, following an international break?" he said.
"We had more than the top clubs last season and we have four already to prepare for this season. It's going to be very difficult for us to win the Premier League because the other teams are so strong, but I want our supporters to know that despite the disadvantages we have, we will fight all the way.
"We will fight to cope with our more difficult kick-off times and all the other decisions which are going against us."
A spokesman for the Premier League denied any bias against Liverpool. "We try to ensure dealings with all our member clubs, including the scheduling of fixtures, are as fair as possible," he said.
"We are disappointed to read Rafael Benitez's remarks in the media, especially as channels exist for every member club to raise any issues directly with the League."
Heinze had been planning to appeal against the Premier League's decision before news came through of Real Madrid's move.
"I would like to ask the Premier League a number of questions," said Benitez. "How can a player with a signed agreement be treated like this? He has a document which is clear, but the Premier League prefers to believe the word of someone else who made a mistake.
''I know there were accusations made against Liverpool in the hearing, which were unbelievable. How can this be allowed?
''Then I want to ask the Premier League why it was so difficult for Liverpool to sign Javier Mascherano, when we had to wait a long time for the paperwork, but it was so easy for Carlos Tevez to join Manchester United?"
Argentina midfielder Mascherano joined Liverpool from West Ham in the January transfer window and the deal took weeks to clear as the row over third-party ownership of players at Upton Park raged on. The Tevez move from West Ham to United took less time to approve.
Benitez also broadened his complaint to the fixture schedule.
"I would like to ask the Premier League why is it that Liverpool always play the most fixtures away from home in an early kick-off, following an international break?" he said.
"We had more than the top clubs last season and we have four already to prepare for this season. It's going to be very difficult for us to win the Premier League because the other teams are so strong, but I want our supporters to know that despite the disadvantages we have, we will fight all the way.
"We will fight to cope with our more difficult kick-off times and all the other decisions which are going against us."
A spokesman for the Premier League denied any bias against Liverpool. "We try to ensure dealings with all our member clubs, including the scheduling of fixtures, are as fair as possible," he said.
"We are disappointed to read Rafael Benitez's remarks in the media, especially as channels exist for every member club to raise any issues directly with the League."
Heinze had been planning to appeal against the Premier League's decision before news came through of Real Madrid's move.
