Barcelona coach Pep Guardiola has backed Dmytro Chygrynskiy after a poor performance by the Ukraine defender in Tuesday's 2-1 King's Cup defeat by Sevilla provoked whistles from the home fans at the Nou Camp.
"Dima is a fantastic player and the more he gets whistled the more support we will give him because he has many years ahead of him here," Guardiola told a news conference.
The 23-year-old, who joined Barca from Shakhtar Donetsk at the end of August for 25 million euros ($36 million), gave the ball away several times and conceded the penalty that led to Sevilla's winner in the first-leg match.
"It will cost him more than others (to settle in) because of where he has come from and the price we paid but if anyone is responsible it's me not him," Guardiola added.
The Barcelona boss also assumed full responsibility for Barcelona's Copa del Rey defeat to Sevilla, but remains confident the defence of their crown is still salvageable.
''We've lost and therefore I was wrong,'' said Guardiola, who also pointed out that he had made mistakes before but ''as we were winning, there were no complaints''.
However, with Barca still chasing fresh honours on three fronts this season, Guardiola insists he will need to carry on utilising his whole squad if the Catalan giants are to continue their remarkable run of success.
''I'm the one who takes the decisions,'' he added. ''I make changes because I'm the one in charge, at least until the president gets rid of me.
''I make changes for the health of the changing room, because all the players deserve it and I want them to play. I need them all. The six titles were won by all of us, and not only 11 players.''
Despite the home loss, though, Guardiola has faith that his side can turn things around in next week's second leg at the Ramon Sanchez Pizjuan and book their spot in the quarter-finals.
''There's no doubt that we are going to bounce back. What we need to do is attack and score goals,'' he said.