Lionel Messi said he wants to win the Copa del Rey with Barcelona in order to ease the pain of the Champions League defeat by Liverpool which ranked among the "worst moments of his career".
Speaking at his first news conference in four years, the 31-year-old forward said he was still thinking about the semi-final loss on 7 May when the Reds overturned a 3-0 first-leg deficit.
"We were hit hard by it," he said.
"Winning the Copa del Rey will be the best way to end the season."
The La Liga champions would complete the domestic double if they overcome Valencia on Saturday (20:00 BST), but Messi warned that defeat would mean the team would "feel a lot worse" than they have done.
He added: "We have to apologise for the second half of the match at Liverpool [when they conceded three goals in the 4-3 aggregate loss] not because of the result, but because of how it looked and that we didn't compete. It was one of the worst experiences in my career."
The Argentine forward, who also referred to the club's capitulation to Roma in the Champions League quarter-finals last season, defended coach Ernesto Valverde, stating the players were to blame for the Anfield defeat and added that he wanted the Spaniard to remain at the Nou Camp.
When asked if he himself was considering leaving Barcelona, Messi responded: "No, no, no.
"I have had problems with the national team and I still want to keep trying to win something there. The Champions League exit does not make me lose my desire to be here."
The club legend could win his seventh Copa del Rey and 21st major trophy with the Catalan giants on Saturday.
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