Hansi Flick hit out at reports involving Marcus Rashford and Lamine Yamal in an X-rated rant.
Barcelona resumed their league campaign on Saturday following the October international.
Speaking ahead of his side's home La Liga fixture against Girona, Flick was forced to dismiss insinuations that Rashford and Yamal have been treated differently.
Spanish media have accused Barca's hierarchy of 'forcing' Flick to start Yamal against Paris Saint-Germain in the Champions League earlier this month, even though the 18-year-old arrived late for a team meeting.
Advert
Rashford, on the other hand, had been dropped from their starting XI against Getafe last month for the same offence.
Claims emerged that Yamal's handing represented 'double standards' given Rashford's punishment.
However, Flick came out firing in Friday's press conference, slamming a 'liar' within the Barca camp and rubbishing claims he was 'forced' to pick the teenage phenom against PSG.
"I'd like to know where you're getting that rumour from," he began.
Flick added: "It's b*******. It's not true. At this club, with Deco and the rest of the professionals, I have a real relationship. I believe in my work. I have their trust, and they wouldn't ask us for it. It's rubbish. Whoever said it lied."
Rashford falling foul of the Barca rule has been the only blip of his spell at the club since his move from Manchester United, having enjoyed a terrific start to life in Spain.
The England international has scored three goals across all competitions this season, including a brace against Newcastle United in the Champions League.
During this month's international break, Rashford was asked about his red-hot form and in doing so, he appeared to aim a dig at Man United.
"For sure, consistency is a massive part of it," he began.
"I feel like I have been in an inconsistent environment for a very long time, so it is even more difficult to be consistent.
"But I completely agree, I think consistency is what I need to bring into my game and I am looking to do that."
Topics: Marcus Rashford, Lamine Yamal, Barcelona, Football
Nasir Jabbar