FC Barcelona captain Lionel Messi has questioned the fans who continue to jeer club-record signing Philippe Coutinho.
The Camp Nou was packed to the rafters with over 98,000 fans in attendance for another Messi masterclass, who scored twice in the second half to leave Liverpool with a mammoth task to overturn the deficit in the return leg at Anfield.
Despite the scoreline, Jurgen Klopp's side dominated large spells of the game and forced Barcelona into a change of system shortly after the first-half to stop the relentless wave of attacks from the Merseysiders.
While Luis Suarez grabbed the opener against his former club, ex-Liverpool star Coutinho was less impressive and he was removed on the hour mark to a chorus of boos and whistles from the home crowd.
And Messi has since come out to support the Brazil international who's form has brought his long-term future into question in recent months.
"This is a time when we have to be more united than ever, both as players and fans," Messi said after the game, as per The Mirror.
"This is something we have to achieve together and it is not the moment to criticise anybody. It is ugly to see [the crowd] treat a team-mate like that.’
The five-time Ballon d'Or winner went on to warn his teammates against any potential complacency despite the three-goal advantage.
"We know that it is not decided. We still have to go to a very difficult stadium, but we are very happy."