Luis Suárez has once again protested his innocence in his spat with Patrice Evra in 2011, claimed there was no evidence against him and insisted allegations of racism were not true.

Speaking as he prepares to make his competitive Barcelona debut, once his four-month ban expires on 25 October, Suárez also revealed he initially could not accept his actions at this summer’s World Cup in Brazil, where he was found guilty of biting Italy’s Giorgio Chiellini.

Suárez has always maintained his innocence against the accusation of racially abusing Evra, despite being found guilty by a three-man Football Association panel, given an eight-match suspension and fined £40,000 following Liverpool’s match with Manchester United in October 2011. At the time he released a statement, saying he had been “accused of something which I did not, nor would not, ever do” and speaking to Barça Magazine, his stance remains forthright.

“When I say I’m sorry it’s because I regret something,” he said. “Being sorry implies regret but they have also sometimes judged me on things that aren’t true, such as the racism thing. I was accused without evidence and that’s what grieved me the most. The others were actions when it was me who did wrong. I accepted that and begged forgiveness but the racism thing, when I was accused without evidence, that did upset me.”

So far limited to friendly appearances following his £75m move to Barcelona over the summer, Suárez is in line to make his competitive debut for the Catalan club on 25 October against, as fate would have it, Real Madrid at the Bernabéu.

Initially indignant in the face of widespread condemnation for his bite on Chiellini, and indeed denying the accusation, Suárez later apologised for his actions – a gesture perceived by many as means of smoothing the way for his move to Barcelona.

Suárez, however, has claimed that the delay in issuing his apology was because he was not able to acknowledge what he had done. “It is good to accept that you have made a mistake and that’s what I did,” said Suárez, who was charged with violent conduct by the FA and banned for 10 matches for biting Chelsea’s Branislav Ivanovic in April 2013. “I left it a few days because you have to remember that I’m only human and sometimes it’s hard to face the truth. I found it hard to take in and to realise what I had done. Those were days when I didn’t want to know about it. I just wanted to be with my wife and children, who supported me through that time. I didn’t want to listen to anybody, or speak to anybody. I didn’t want to accept it.”

Despite sitting out Barcelona’s flying start to the season, Suárez demonstrated his sharpness for Uruguay on Monday, scoring twice in a 3-0 win over Oman and he is in contention to start in el clásico.

“All I can say is that I have arrived with the desire to be a success at Barça, that I am hungry to win titles,” Suárez continued. “I haven’t played in Europe for a few years and I want to do the best I can in every game. I am not giving anything away because nothing in my life was given to me. I imagine what it’ll be like to pull on the shirt, to be with the rest of the team in the dressing room before the match, getting kitted up to play and, as chance would have it, in such a stadium. It’s a huge coincidence but I’m looking forward to the experience. You know, I’m the kind of person who believes that things happen for a reason, and out of all 19 teams in the league, it’s precisely against Real Madrid at the Bernabéu that I’ll make my comeback. There must be a reason.”