As Fernando Torres prepares to come face-to-face with his former club on Sunday he has warned the Liverpool fans that the full story behind his transfer to Chelsea in January has yet to emerge. The Spaniard left for Stamford Bridge in a £50m move on the final day of the January transfer window and made his debut for Chelsea against Liverpool at Stamford Bridge five days later.

Liverpool won that game thanks to Raul Meireles's goal, much to the delight of the travelling fans who taunted Torres throughout. But the 27-year-old has revealed that the fans who once adored him are in the dark as to the real reasons behind his move.

"Liverpool's fan have stuck with the story the club gave and they don't know the real story," Torres told the Spanish newspaper Marca. "I don't feel bitter towards them, they will always be special for me."

Torres also paid tribute to the former Liverpool manager Rafael Benítez, who brought him to the Premier League from Atlético Madrid in 2007. "I owe so much to Rafa Benítez, no one understood me like him," he said. "He's a great coach. His teams go out with just one thing in mind: compete. Even with a smaller budget his teams can compete with the best."

Though Torres has struggled to find form following his transfer, scoring just three league goals in 22 appearances, he thanked the Chelsea fans who have stayed supportive of him during this time, but warned that the team cannot afford to drop any more points following two defeats in their last three league fixtures.

"I feel indebted to the Chelsea fans. They have really supported me and when I see them they encourage me. If I have learnt one thing in life it is never to give up. I look at myself and I know I can get back to my best," he said.

"Against Liverpool we cannot allow ourselves to drop more points. It will be special. Liverpool are a team in transition and you can't do that overnight. You need time. They've made an effort economically and, like any project, it needs time to bed in."

Torres was booed by England fans after coming on as a substitute for Spain in Saturday's defeat at Wembley and he is expecting a similar reception from Liverpool fans on Sunday. "I am sure they will boo me more [than the English fans did]," he said.