Barcelona striker Luis Suarez has accepted responsibility for most of his past misdemeanours but is still "upset" over his punishment for racially abusing Manchester United's Patrice Evra.

The 27-year-old is set to make his competitive comeback from a four-month worldwide ban next week in El Clasico against Real Madrid at the Bernabeu, which was imposed after he bit Italy defender Giorgio Chiellini during the World Cup.

While he accepts his current suspension, and the 10-game ban imposed for a similar incident involving Chelsea's Branislav Ivanovic were his own fault, the controversial Uruguayan is still unhappy over how his argument with Evra in October 2011 was dealt with.

"It is good to accept that you have made a mistake and that's what I did," he said in reference to the Chiellini bite.

"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. When I say I'm sorry it's because I regret something. 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."

Suarez has been allowed to play in friendlies during his ban after successfully appealing against an original ruling which prevented him from being involved in any football-related activity.

On Monday he scored twice for Uruguay in a 3-0 win over Oman but admits he cannot wait to end his competitive exile.

"The first two months were the hardest because I didn't feel like a footballer. That was the worst part," he added.

"It is always good to accept your mistakes but what angered me most was not feeling like a professional, not feeling like another worker, like other footballers do. That's what hurt me the most."

Suarez also claimed that Liverpool would never have mounted their unexpected title challenge last season without him.

The striker scored 31 Premier League goals as the Reds finished runners-up to Manchester City and insists he left Anfield a happy man this summer, when a £75million deal took him to the Nou Camp.

That contrasted sharply with his feelings at the start of his final campaign in England, for which he was suspended as he was still serving some of his 10-game ban for biting Chelsea's Branislav Ivanovic, and he was made to train on his own after trying to manufacture a move away.

While he was serving the remainder of his ban Liverpool picked up 10 points out of a possible 15 but having been reintegrated into the squad the striker returned with 19 goals in his first 12 league appearances as the Reds gathered increasing momentum on their way to second place.

"Personal success is always welcome and makes you happy, because that's recognition of the good work you have done," said Suarez, who is due to receive the Golden Shoe for being Europe's joint-leading scorer from Liverpool icon Kenny Dalglish in Barcelona this week.

"But I put the team ahead of that and last season Liverpool came so close to winning the Premier League, which would have been spectacular."

Suarez added on fcbarcelona.com: "I appreciate all the work the team did but I missed six matches and scored all those goals in the Premier League without being the penalty-taker.

"The truth is that I left very happy because if I hadn't had the attitude and mentality to want to lead the team forward, I don't think Liverpool would have done as well as they did either.

"Getting back into the Champions League was another target I had in mind."